THE  UNIVERSITY 
OF  ILLINOIS 
LIBRARY 


5tJ3.^\ 
W \\ 

V 


*\s*>r* 


u\fcr*rV 


Digitized  by  the  Internet  Archive 

in  2015 


https://archive.org/details/northamericancri03wach 


MEMOIRS 


OF  THE 


MUSEUM  OF  COMPARATIVE  ZOOLOGY 


HARVARD  COLLEGE. 


EIGHTY-THREE  PLATES  TO  ACCOMPANY. 


Volumes  XX.  and  XXL 


CAMBRIDGE,  U.S.A. 
PRINTED  FOR  THE  MUSEUM. 
1897. 


University  Press  : 

John  Wilson  and  Son,  Cambridge,  U.  S.  A. 


CONTENTS. 


THE  NORTH  AMERICAN  CRINOIDEA  CAMERATA.  By  Charles  Wachsmuth  and 
Frank  Springer. 


PLATES  I.  TO  LXXXIII. 

Together  with  the  accompanying  Explanation. 


ULmoirs  of  1 be  JftusMnt  of  Comprafifce  ^odlojjn 

AT  HARVARD  COLLEGE. 
Eigiity-Tiiuee  Plates  to  Accompany. 

Vols.  XX.  AND  XXL 


THE  NORTH  AMERICAN 

CRIAOIDEA  CAMERATA. 


By  CHARLES  WACHSMUTH  and  FRANK  SPRINGER. 


EIGHTY-THREE  PLATES. 


CAMBRIDGE,  U.S.A.: 
Printed  for  tfje  fHusrum, 
May,  1897. 


PLATES  AND  EXPLANATION  OF  THE  PLATES. 


97264 


PLATE  I. 


Page 

ig.  1.  A long  stem  with  a finely  preserved  Root,  probably  belonging  to  Poteriocrinics. 


From  the  Burlington  Limestone 44 

2.  Stem  with  enormous  Cirri,  probably  of  Batocrinus  yrandis,  with  large  cysts 

on  two  of  the  cirri.  From,  the  Keokuk  group  at  Crawfordsville  ....  43 

3.  Stem  fragment  from  the  Upper  Devonian  of  Kentucky,  with  five  rows  of 

large  cirri,  longitudinally  arranged 43 

4.  Terminal  end  of  a Stem,  apparently  of  Barycrinus,  attached  by  a flat  surface. 

From  the  Lower  Burlington  Limestone. 
a.  Profile  view  of  the  same. 


b.  Surface  of  attachment  of  same,  showing  open  grooves  passing  out  from  the 

axial  canal  of  the  stem 46 

5.  Terminal  end  of  Stem  of  Barycrinus,  showing  the  large  asteriform  canal  of 

stem,  and  the  linear  canal  of  the  cirri 46 

6.  The  quinquepartite  Stem  of  a Barycrinus,  somewhat  weathered,  showing  the 

longitudinal  divisions,  and  two  series  of  pores  to  each  segment  ....  46 

7.  Terminal  end  of  Stem  of  Barycrinus,  showing  the  large  axial  canal,  with  the 

laminated  structures 46 

8a,  b.  Sections  of  stem  fragments  of  Barycrinus,  showing  slits  and  pores  through 

the  walls 46 

9,  10.  Dorso-central  Plates,  supposed  to  belong  to  a species  of  Heterocrimis. 

From  the  Hudson  River  group  at  Cincinnati 49,  51 

(All  specimens  are  in  the  collection  of  Wachsmuth  and  Springer.) 


Crinoidea  Camerata. 


Plate  I. 


,v„ 


J.L.Ridgway  del . 


Heliotype  Printing  Cc.  Bcstc'n 


PLATE  II. 


Detached  Stem  Joints  of  various  fossil  Crinoids. 

. 1 is  a joint  of  Pentacrinus ; fig.  2 of  Rhizocrinus.  The  stem  fragment,  fig.  3, 
belongs  to  Mespilocrinus ; figs.  5,  8,  9,  11,  and  12  to  Platycrinus ; fig.  6 to 
Teleiocrinus,  and  fig.  7 to  Cactocrinus.  The  specimen  fig.  10,  which  probably 
belongs  to  an  Actinocrinus,  shows  beautifully  the  striations  at  its  upper  face, 
and  fig.  13  the  connection  of  the  cirrus  canal  with  the  stem  canal. 

4 a and  b represent  the  proximal  end  of  the  stem  of  an  Onychocrinus,  — 4 b showing 
the  infrabasals  coalesced  with  the  top  stem  joint  (pp.  62,  65). 

17  and  38  represent  wide  nodal  joints  to  which  extremely  narrow  internodal  ones 
are  attached.  Figs.  39  to  41  are  nodal  joints,  with  or  without  internodals ; 
figs.  42  to  48  nodals,  followed  by  internodals  resting  wholly  or  partly  between 
the  projecting  margins  of  the  nodals.  Traces  of  new  joints  occur  in  figs.  33 
and  35.  The  joints  in  figs.  14  and  20  probably  belong  to  Megistocrinus  Evansi  ; 
fig.  21  to  Periechocrinus  Whitei ; figs.  32,  36,  and  39  to  Cactocrinus  ; fig.  40  to 
Teleiocrinus ; to  the  five  oval  pieces  shown  by  figs.  49  to  53  to  Platycrinus. 


LIBRARY 
•F  THE 

UNIVERSITY  ®f  ILLINOIS 


Crinoidea  Camerata. 


Pirate  II 


A.M.Westergren.  del. 


Heiiotype  Printing  Co., Boston. 


Crinoidea  Camerata. 


Plate  III. 


ChasR  Keyes.  GLiljevall,  AM.Westergreix  del. 


Heliclype  Printing  Cc,  Boston. 


PLATE  III. 


Tiie  Plates  surrounding  and  closing  the  Peristome. 

Page 

Fig.  la.  Cyathocrinus  Gilesi  W.  and  Sp.  The  interradial  plates  abutting  upon  the 
radials  preserved,  but  those  covering  the  peristome  removed.  (Coll.  W. 

and  Sp.) 95,  114 

lb.  Another  specimen  of  the  same  species,  with  the  interradial  plates  partly- 
covered  by  small  marginal  pieces ; — otherwise  in  the  same  condition  as 
fig.  la.  (Same  collection.) 95 

2.  Cyathocrinus  brevisacculus  W.  and  Sp.  (Ms.).  Showing  the  disk  ambulacra 

and  the  madreporite ; the  large  interradial  plates  exposed  to  view.  (The 
figure  is  drawn  with  the  anal  side  up.  Same  collection.)  ....  96,  114 

3.  Cyathocrinus  nodosus  W.  and  Sp.  (Ms.).  Like  fig.  2 ; but  the  orals  still 

more  asymmetrical,  and  the  interradial  plates  covered  by  marginal  pieces. 
(Same  collection.) 96,  114 

4.  Cyathocrinus  multibrachiatus  Hall.  Like  fig.  3 ; but  with  the  orals 

resorbed.  (Same  collection.) 96,  114 

5.  Euspirocrinus  spiralis  Angel.  Interradial  -plates  exposed,  very  large,  en- 

closing large  covering  pieces  which  close  the  peristome.  (Drawn  with 
anal  side  up.  Zool.  Elks  Mus.,  Stockholm.) 96 

6.  Cyathocrinus  alutaceus  Angel.  Arrangement  of  orals  as  in  Platycrinus, 

asymmetrical ; surrounded  by  small  perisomic  pieces.  (Same  collection.)  96,  114 

7.  The  same  species.  The  oral  apparently  in  process  of  resorption.  (Drawn 

with  anal  side  to  the  left.  Same  collection.) 98,  114 

8.  Cyathocrinus  l.evis  Angel.  The  orals  partly  resorbed.  (Drawn  with 

anal  side  up.  Same  collection.) 96,  114 

9.  Thaumatocrinus  renovatus  P.  H.  Carpenter.  Having  large  symmetrical 

orals  surrounded  by  perisome.  (After  Carpenter.) 88 

10.  The  ventral  disk  of  Hyocrinus  bethellianus  W.  Thom.  The  orals  surrounded 

by  a narrow  band  of  perisome.  (After  Carpenter.) 88,  99 

11.  Taxocrinus  intermedius  W.  and  Sp.  Ventral  disk  formed  of  small  movable 

plates ; the  orals  consisting  of  four  small  plates  and  a larger  one,  sepa- 
rated by  the  ambulacra ; the  mouth  opened  out.  (Coll.  W.  and  Sp.)  88,  89,  101 

12.  Haplocrinus  mespiliformis  Goldf.  The  orals  resting  upon  the  radials. 

12a.  Posterior  side  of  the  oral  pyramid. 

12 b.  Ventral  aspect  of  the  same.  (Coll.  W.  and  Sp.) 92,  93 

13.  Myrtillocrinus  americanus  Hall.  Orals  as  in  the  preceding  genus. 

(Amer.  Mus.  Nat.  Hist.  New  York.) 89 

14.  Coccocrinus  rosaceus  F.  Eoemer.  The  orals  symmetrical ; separated  from 

the  radials  by  a single  interradial  plate.  (Coll.  W.  and  Sp.)  ....  89,  90 


Page 

Fig.  15.  Idiocrinus  ventricosus  W.  and  Sp.  The  orals  represented  by  an  un- 
divided disk  which  is  surrounded  by  hve  interradial  plates  not  shown  in 
the  figure.  (Same  collection.) 205 

16.  Platycrinus  symmetrtcus  W.  and  Sp.  The  orals  almost  symmetrical. 

(Same  collection.) 94,  655 

17.  Platycrinus  discoideus  0.  and  Sli.  The  orals  more  asymmetrical.  (Same 

collection.) 88,  89,  94,  713 

18.  Eretmocrinus  coronatus  (Hall).  The  orals  distinctly  asymmetrical.  (Same 

collection.) 88,  89 

19.  Talarocrinus  decornis  W.  and  Sp.  The  posterior  oral  extremely  large, 

the  other  four  unrepresented.  (Same  collection.) 88 

20.  Dorycrinus  mississippiensis  Shum.  The  orals  unusually  asymmetrical. 

(Same  collection.)  88,  89 

21.  Eutrochocrinus  Ciiristyi  Shum.  The  orals  excentric  and  asymmetrical. 

(Same  collection.) 88,  89 

22.  Agaricocrinus  Wortiieni  F.  Roemer.  The  orals  separated  from  one  an- 

other by  perisomic  plates.  (Same  collection.) 88,  89 

23.  Marsupiocrinus  depressus  Angel.  The  orals  quite  small  and  asym- 

metrically arranged.  (Same  collection.) 88,  89 

24.  Rhodocrinus  Whitei  Hall.  The  orals  altogether  unrepresented.  (Same 

collection.) 89 

25.  Symbathocrinus  Wachsmuthi  M.  and  W.  The  orals  asymmetrical,  and 

supported  by  the  upper  muscle  plates.  (Same  collection.) 89 


(Figures  la,  4,  5,  6,  7,  8,  and  16  enlarged  t ; Figures  2,  3,  and  15,  f .) 


PLATE  IV. 


Page 

. 1.  Ventral  aspect  of  the  internal  cast  of  a specimen  of  Teleiocrinus,  with  sub- 

tegminal  ambulacra  resting  against  the  inner  floor  (f) 102 

2.  The  same  aspect  in  a natural  cast  of  Physetoorinus  ventricosus  ip  . . dU  . 102 

3.  The  same  in  a cast  of  Physetocrinus  ornatus 102 

4.  The  same  in  a cast  of  Strotocrinus  regalis 102 

5.  Internal  cast  of  a Dorycrinus,  of  which  the  median  part  of  the  ambulacral 

skeleton,  contrary  to  the  case  of  the  four  preceding  species,  does  not  touch 
the  inner  floor  of  the  tegmen  . 102 

6.  Cast  of  a Platycrinus,  in  which  the  ambulacra  are  subtegminal  to  the  arm 

bases,  being  placed  at  some  distance  from  the  inner  floor  of  the  disk  . . 102 

7.  Cast  of  an  Eutrochocrinus  Christyi,  showing  impressions  of  the  lining  covering 

the  inner  floor  of  the  disk 102 

8.  Cactocrinus  glans,  showing  fragments  of  the  convoluted  (digestive)  organ,  and 

to  the  left  the  subtegminal  ambulacra  of  one  ray  (f) 102 

(In  the  following  specimens  — Figs.  9 to  17  — a second  anal  opening  is 
introduced  at  various  parts  of  the  calyx,  the  regular  aperture  having 
probably  been  obstructed.) 

9.  A specimen  of  Batocrinus,  in  which  a new  opening  has  been  formed  between 

the  basals  toward  the  anterior  side 136 

10.  A specimen  of  Batocrinus  subaegualis,  with  an  abnormal  opening  directly 

above  the  basals,  involving  the  whole  of  the  right  posterior  side  of  the 
dorsal  cup  (slightly  enlarged) 136 

11.  A small  specimen  of  Teleiocrinus  umbrosus,  with  a second  tube  passing  out 

from  the  tegmen 136 

12.  A Steganocrinus  pentagonus,  with  a second  anal  tube  given  off  near  the  base 

of  the  regular  one 136 

13.  A malformed  specimen  of  Eutrochocrinus  Christyi,  with  a second  tube  formed 

above  the  arm  bases 136 

14.  A Batocrinus  laura,  with  a second  tube  given  off  from  the  base  of  the  origi- 

nal one  and  a third  tube  apparently  in  process  of  formation 135 

15.  A specimen  of  Macrocrinus  jucunclus,  in  which  a small  tube  branches  from 

the  regular  one 136 

16.  The  anal  tube  of  Eutrochocrinus  Christyi  with  a transverse  lateral  branch  . 135 

17.  Another  tube  of  the  same  species  bifurcating  above  the  tips  of  the  arms  . . 136 

18.  The  base  of  a Platycrinus,  showing  irregular,  wart-like  protuberances,  dotted 

with  small  circular  pits. 

19.  A radial  plate  with  similar  pits,  surrounded  by  a circular  rim. 

20.  A piece  of  a column  affected  in  a similar  manner. 


(All  specimens  are  in  the  collection  of  Wachsmuth  and  Springer,  except 
that  of  Fig.  6,  which  is  in  the  collection  of  Mr.  R.  R.  Rowley.) 


C'RINOIDEA  CAMERATA. 


Plate  IV. 


A.M  .W  e s tergren.  0 . St  .John  del . 


Hello  type  Printing  Co.. Boston. 


PLATE  V. 


The  Convoluted  Organ,  and  the  structure  beneath  the  Tegmen. 

Page 

Fig.  1.  A specimen  of  Teleiocrinus,  showing  the  convoluted  organ,  and  portions  of  the 

ambulacral  skeleton,  both  heavily  coated  with  silicious  matter  (f)  . 106,  143 

2.  The  same  organ  in  Cactocrinus,  showing  the  partition  which  forms  the  second 

convolution,  the  outer  wall  being  removed 106 

3.  A Teleiocrinus  umbrosus,  with  the  whole  convoluted  organ  intact  (slightly  en- 

larged   / 143 

4.  Another  specimen  of  the  same  species,  exposing  the  walls  forming  the  third 

convolution,  the  two  outer  ones  removed  (slightly  enlarged)  . . . 106,  143 

5.  The  convoluted  organ  of  an  Ayaricocrinus,  seen  from  above 106 

6.  Cross  section  of  the  same  organ  in  a specimen  of  Batocrinus 106 

7.  Dorsal  aspect  of  the  same  organ  in  a specimen  of  Macrocrinus  verneicilianus  . 106 

8.  Lateral  view  of  the  organ  in  M.  verneuilianus ; its  upper  end  surrounded  by 

an  annular  vessel 105, 143 

9.  The  convoluted  organ  in  a specimen  of  Strotocrinus 143 

10.  Cactocrinus  proboscidalis,  showing  a portion  of  the  ambulacral  skeleton,  and 

the  convoluted  organ  beneath 107 

11.  Cactocrinus  thetis,  showing  the  delicate  network  of  the  convoluted  organ  . . 143 

12.  Dorsal  aspect  of  the  organ  in  Eutrochocrinus  Choistyi  (enlarged)  ....  143 

13.  A broken  specimen  of  Dorycrinus,  showing  the  internal  lining  and  covered 

galleries  along  the  inner  floor  of  the  tegmen 106, 107 

14.  The  inner  floor  of  the  tegmen  in  a Physetocrinus  ventricosus 120 

15.  A broken  specimen  of  Lobocrinus  lonyirostris,  showing  the  lining  within  the 

dorsal  cup 106 

16.  The  inner  floor  of  the  tegmen  of  a specimen  of  Teleiocrinus  rudis  ; heavily 

coated  with  silicious  matter 106,  107 

17.  The  inner  floor  of  -Batocrinus  inornatus,  formed  into  open  galleries  for  the 

reception  of  the  ambulacra 106 

(All  specimens  are  in  the  collection  of  Wachsmuth  and  Springer,  except 
those  of  Figs.  10,  11,  and  15,  which  are  in  the  Museum  of  Comparative 
Zoology.) 


Crinoidea  Cambrata 


Plate  V. 


A.M  .Westergren . del. 


Helictype  Printing  Co,Boston. 


Of  THE 


Crinoidea  Camerata. 


Plate  VI. 


in |i»\ 


ffljjk,  'S 

' 

s;Vt'  >i/.' 

mi 


J.  L Ridgway  del . 


Heliotype  Priming  Co.,Boston. 


ID 


PLATE  VI. 


(Figs.  1 to  12  are  represented  to  show  the  orientation  of  the  stem  and  axial 
canal  among  Neozoic  Crinoids ; tigs.  13  to  20  the  close  affinities  between 
the  Ichthyocrinidse  and  Comatulaj.) 

Page 

Millericrinus  Orbignyi  de  Loriol G1 

Fig.  la.  The  crown  with  a portion  of  the  stem ; the  angles  of  the  latter  interra- 
dially  disposed.  (After  de  Loriol ; Crinoides  de  la  France,  FI.  116,  fig.  1.) 

lb.  Inner  aspect  of  the  base ; the  space  which  is  empty  in  most  species  of 
Millericrinus  occupied  in  this  specimen  by  small  infrabasals.  (After  de 
Loriol  ; ibid.,  fig.  lc.) 

Millericrinus  polydactylus  de  Loriol 61 

2a.  The  infrabasals  attached  to  the  truncated  upper  eud  of  the  stem  (lateral 
view). 

2b.  Ventral  aspect  of  the  same.  (Both  after  de  Loriol ; ibid.,  PI.  110,  figs. 
la,  2a.) 


Millericrinus  icaunensis  de  Loriol . . ■.  61 

3.  The  dorsal  cup  with  the  proximal  joint  of  the  stem  attached;  the  angles  of 
the  latter  corresponding  with  the  angles  of  the  basals ; the  axial  canal 
quite  small.  (After  de  Loriol ; ibid.,  PI.  61,  fig.  5d.) 

Millericrinus  Milleri  d’Orbigny 61 

4 a.  Ventral  aspect  of  the  dorsal  cup;  the  diameter  of  the  open  space  between 
the  basals  almost  as  great  as  that  of  the  whole  stem.  (After  de  Loriol  ; 
ibid.,  PI.  96,  fig.  3.) 

4 b.  Dorsal  aspect  of  the  cup,  showing  the  small  size  of  the  axial  canal.  (Ibid., 
Plate  96,  fig.  2a.) 

Millericrinus  Caraboeufi  de  Loriol 61 

5.  Showing  in  a side  view  the  angularities  upon  the  proximal  face  of  the  top 

stem  joint.  Being  radially  disposed,  they  conform  to  the  depressions 
upon  the  outer  face  of  the  basal  disk ; whereas  the  angles  along  the  sides 
of  the  stem  are  directed  interradially,  in  accordance  with  the  rule  govern- 
ing dicyclic  Crinoids.  (Ibid.,  PI.  59,  fig.  Sc.) 

Millericrinus  munsterianus  d’Orbigny 62 

6.  Top  stem  joint,  showing  the  angular  ridges  upon  the  upper  surface.  (After 

de  Loriol ; ibid.,  PI.  83,  fig.  2.) 


Page 

Riiizocrinus  Rawsoni  Pourtales 63 

Fig.  7 a.  Dorsal  aspect  of  the  cup;  the  vacant  space  between  the  basals  of  different 
form,  and  larger  than  the  axial  canal  of  the  stem.  (After  P.  H.  Carpenter ; 
Challenger  Rep.  on  Stalk.  Crin.,  PL  X.,  fig.  5.) 

7b.  Distal  face  of  a stem  joint.  {Ibid.,  fig.  14.) 

Pentacrinus  asterias  W.  Thomson G5 

8.  Dorsal  aspect  of  the  cup  ; the  empty  space  within  the  basal  ring  interradially 

disposed.  (Carpenter,  ibid.,  PI.  XII.,  fig.  16.) 

Metacrinus  angulatus  P.  H.  Carpenter 65 

9.  The  space  within  the  basal  ring,  contrary  to  preceding  figure,  radially  dis- 

posed. (After  Carpenter  ; ibid.,  fig.  2.) 

Bathycrinus  aldrichianus  P.  H.  Carpenter 65 

10.  Horizontal  section  of  the  basal  ring.  (After  Carpenter ; ibid.,  PI.  YIIA 

fig.  2.) 

11.  The  infrabasals  of  Onychocrinus,  coalesced  with  the  top  stem  joint.  (Coll. 

W.  and  Sp.) 65 

12.  Dorsal  aspect  of  the  Base  of  Glyptocrinus  decadactylus  ; the  interradial 

outline  of  the  upper  stem  joint  taking  its  form  from  the  basal  concavity. 

(Same  collection.) 66 

13.  14,  and  15.  Pentacrinoid  larvae  of  Antedon.  (After  P.  II.  Carpenter ; Chall. 

Rep.  on  the  Comatulce,  PI.  XIV.) 152 

16.  A young  Taxocrinus  from  the  Burlington  Limestone.  (Coll.  W.  and  Sp.)  152 

17.  A young  Onychocrinus  from  the  Keokuk  Group.  (Same  collection. ) . . 152 

Antedon  Rosacea  Lamarck 152 

18.  In  its  young  stage  ; the  centro-dorsal  and  succeeding  stem  joints  interradi- 

ally disposed,  the  primary  cirri  radially.  (After  W.  B.  Carpenter ; Philos. 
Trans.  1866,  PI.  XLI.) 

19.  In  its  adult  state.  {Ibid.,  PI.  XXXVIII.) 

Onychocrinus  Ulrichi  S.  A.  Miller 152 

20.  In  its  general  structure  resembling  a young  Antedon. 

(Figs.  2b,  4a,  7a,  8,  9,  10,  11,  12,  18,  are  drawn  with  the  interradial  side  up ; 

Figs,  lb,  3,  4b,  6,  19,  20  with  the  radial  side  up.) 


PLATE  VII. 

Page 

Scaphiocrinus  elegans  W.  and  Sp.  (MS.) 138 

Fig.  la.  Anterior  side  of  the  specimen,  showing  the  ventral  sac  and  the  anal  open- 
ing low  down  in  the  sac.  (Only  the  lower  half  of  the  specimen  is  drawn.) 
lb.  ' Posterior  side  of  the  specimen.  (Ivaskaskia  group,  Kentucky.) 

Scytalocrinus  validus  W.  and  Sp.  (MS.) 138 

2a.  Lateral  aspect  of  a specimen  with  arms  ; the  anal  opening  located  anteriorly 
in  the  lower  part  of  the  ventral  sac. 

2b.  The  ventral  sac  somewhat  enlarged. 

3.  Anterior  side  of  the  sac  of  another  specimen.  (Both  from  the  Keokuk  group, 

Indiana. 

Decadocrinus  grandis  W.  and  Sp 138 

4.  Anal  opening  occupying  the  anterior  side  of  the  sac  a little  above  midway  ; 

the  pores  at  the  lower  part  of  the  sac  passing  through  the  test,  as  shown 
upon  the  lateral  edges  of  the  plates. 

5.  A specimen  showing  the  posterior  side  of  the  sac.  (Keokuk  group,  Craw- 

fordsville,  Ind.) 


Scaphiocrinus  unicus  Hall 138 

6.  Posterior  side  of  a specimen,  showing  the  ventral  sac  to  its  full  length. 

(Locality  and  position  same  as  last.) 

Scytalocrinus  (sp.  undet.) 138 

7.  Anterior  view  of  ventral  sac,  showing  the  pores  along  the  sides  of  the  plates, 

and  the  position  of  the  anus.  (Kaskaskia  group,  Kentucky.) 

Scaphiocrinus  Swallovi  Meek  and  Worthen 138 


8.  Portion  of  the  ventral  sac ; composed  of  stellate  plates  with  pores  around 

their  edges.  The  ducts  of  the  pores  plainly  visible  in  places  where  the 
plates  are  slightly  pushed  out  of  position 

Aulocrinus  Agassizi  W.  and  Sp.  (MS.  Nov.  gen.  and  n.  sp.)  . . 138 

(aiA-os  a small  tube,  Kplvov  a lily.) 

9.  Right  postero-lateral  aspect.  Anus  at  the  end  of  a special  tube,  given  off 

half  way  down  from  the  anterior  side  of  the  ventral  sac.  Sac  and  tube 
profusely  perforated  by  pores.  (Keokuk  group,  Indiana.) 


Cceliocrinus  ventricosus  (Hall) 138 

10a.  Posterior  side  of  the  ventral  sac. 

106.  Anterior  side  of  it. 

C v athocrinus  nodosus  W.  and  Sp.  (MS.) 137 


11a.  The  anus  at  the  end  of  the  ventral  sac  slightly  excentric  in  position,  and 
closed  by  eight  or  nine  plates  forming  a pyramid. 

11b.  Distal  end  of  the  ventral  sac  enlarged. 

Cyathocrinus  brevisacculus  W.  and  Sp.  (MS.) 137 

12a  and  b.  The  ventral  sac  with  the  anus  in  the  same  condition  as  in  the  pre- 
ceding species. 

(All  specimens  are  in  the  collection  of  Wachsmuth  and  Springer.) 


Crinoidea  Gamer ata. 


Plate.  VII. 


A.M.Westergren.  del. 


Heliotype  Printing  Co.  Boston. 


CRINOID'EA  Camerata. 


Plate  VIII. 


t 

F- •'-••'.» 

y— — 1 — : — 

fill 

G Inljevail,  Chas  R.Keyes.del 


Heliotype  Printing  Go.  Boston. 


PLATE  VIII. 


Page 

Barrandeocrinus  sceptrum  Angel 484 

Fig.  1.  Showing  arrangement  of  the  plates  in  the  calyx,  and  structure  of  arms  and 
pinnules.  (Drawn  by  Mr.  G.  Liljevall  from  a specimen  from  Gotland  in 
the  Zool.  Riks  Mus.  at  Stockholm)  (f). 

Crotalocrinus  pulcher  (Hisinger) 164 

2.  A specimen  from  Gotland,  showing  the  net  formed  arms.  (Coll.  W.  and  Sp.) 

Crotalocrinus  n.  sp 164 

3.  The  tegmen  of  a specimen  from  Gotland;  drawn  by  Mr.  G.  Liljevall  (Zool. 


Riks  Mus.,  Stockholm)  (f). 

Crotalocrinijs  rugosus  (J.  S.  Miller) 164 

4.  Tegmen  of  a fine  specimen  from  Dudley,  Eng.  (\J).  (Coll.  W.  and  Sp.) 

Taxocrinus  intermedius  W.  and  Sp 118,  123 


5a.  Showing  the  pavement  of  the  ventral  disk,  and  the  pouches  along  the  free 
rays.  Antero-lateral  view. 

5b.  Posterior  view.  (Coll.  W.  and  Sp.) 

Forbesiocrinus  nobilis  de  Ivon,  and  le  Hon 87,  88 

(Plates  showing  the  fossae  along  the  edges.) 

6 a.  Distal  face  of  the  axillary  costal  (^) . 

6b.  Proximal  face  of  the  same  (’T-). 

6c.  Lateral  face  of  an  interradial  plate  (V).  (Same  collection.) 

Symbathocrinus  Savallovi  Hall 136 

7.  A specimen  with  arms,  from  the  Keokuk  group  of  Canton,  Ind.  (Coll.  W. 

and  Sp.) 

Symbathocrixus  Wachsmuthi  M.  and  W 89 

8.  A specimen  with  the  arms  removed  at  the  posterior  side,  exposing  some  of 

the  plates  of  the  anal  tube,  and  the  asymmetrical  orals.  (Coll.  W.  and  Sp.) 

9.  Another  specimen  also  showing  the  orals,  and  the  base  of  the  anal  tube  (f). 

(Same  collection.) 

Pisocrinus  (sp.  undet.) 136 

10.  Lateral  view  of  a specimen  with  arms  from  Tennessee.  (^)  (Coll.  W. 

and  Sp.) 

(This  figure  was  drawn  by  Mr.  Keyes  in  1886,  from  a specimen  found  by  us 
in  Western  Tennessee  in  1883.  Mr.  S.  A.  Miller,  in  the  17th  Report  of 


the  Indiana  Geological  Survey  for  1891,  p.  637,  took  the  liberty  of  stating, 
most  unwarrantably,  that  we  had  described,  in  the  third  part  of  the 
Eevision  of  the  Palaeocrinoidea,  p.  173  (1885)  the  arms  of  Pisocrinus, 
which  we  “ knew  nothing  whatever  about.”  The  tone  of  his  article  was 
such  as  to  preclude  any  notice  from  us,  except  to  publish  this  figure  in 
refutation  of  his  statement.  Angelin  figured  the  arms  of  Pisocrinus  as 
early  as  1877.) 

Allagecrinus  Carpenteri  W.  and  Sp 78 

Fig.  11.  The  type  specimen,  with  two  arms  in  one  or  more  of  the  rays.  (Illinois 
State  Collection.) 

Stephanocrinus  angulatus  Hall 46 

12.  A very  elongate  specimen.  (Amer.  Mus.  Nat.  Hist.  New  York.) 

13.  The  disk  in  perfect  preservation ; the  centre  closed  by  five  symmetrical 


orals.  (Same  collection.) 

Catillocrinus  Wachsmuthi  M.  and  W 72 

14.  Specimen  with  arms,  ventral  tube  and  stem.  (Coll.  W.  and  Sp.) 

Marsupiocrinus  radiatus  Angel 103 


15.  The  tegmen,  with  small,  regularly  arranged  covering  pieces  (^).  (Drawn 
from  a specimen  in  the  Zool.  Eiks  Mus.,  Stockholm,  by  Mr.  G.  Liljevall). 


PLATE  IX. 


Page 

Reteocrinus  Onealli  (Hall) 179 

Fig.  la.  Anterior  view  of  a specimen  with  arms  (f).  (Coll.  I.  H.  Harris.) 

lb.  Posterior  view  of  another  specimen  with  arms.  (Coll.  AV.  and  Sp.) 

lc.  Lateral  view,  showing  ventral  disk.  (Same  collection.) 

ld.  A portion  of  the  ventral  disk  enlarged.  (Same  collection.) 

le.  Inner  floor  of  the  calyx,  showing  the  small  supplementary  plates  which 


surround  the  primary  interbrachials  (f).  (Same  collection.) 

1 f.  The  type  of  “ Glyptocrinus  cognatas.”  (After  Miller.) 

Reteocrinus  magnificus  S.  A.  Miller 181 

2.  Side  view  of  a specimen  with  arms  and  portions  of  stem.  (Col.  I.  H.  Harris.) 

Reteocrinus  stellaris  Billings 178 


3a.  One  of  the  type  specimens,  posterior  view.  (Museum  Geol.  Surv.,  Canada.) 


3b.  Anterior  view  of  another  type  specimen.  (Same  collection.) 

3c.  Part  of  the  calyx,  showing  the  fixed  bracliials.  (Same  collection.) 

Reteocrinus  fimbriatus  Billings 179 

4.  The  type  specimen  in  a lateral  view.  (Museum  Geol.  Surv.,  Canada.) 

Xenocrinus  Baeri  (Meek) 185 


5a.  Posterior  view  of  a specimen  with  arms.  (Coll.  I.  H.  Harris.) 

5b.  Lateral  view  of  another  specimen  with  arms.  (Coll.  W.  and  Sp.) 

5c.  Inner  floor  of  calyx  Q$).  (Coll.  I.  H.  Harris.) 

5d.  Section  of  an  arm,  greatly  enlarged. 

Xenocrinus  penicillus  S.  A.  Miller 183 

6a.  Lateral  view  of  one  of  the  types  (f).  (Same  collection.) 

6b.  Posterior  view  of  another  type  specimen  (f).  (Same  collection.) 

Tanaocrinus  typus  AY.  and  Sp 186 

7a.  Posterior  view  of  a type  specimen  (f).  (Coll.  AV.  and  Sp.) 

7b.  Anterior  view  of  another  type  specimen  (£).  (Same  collection.) 

7c.  The  stem,  enlarged. 


Crinoidea  Camerata. 


Plate  IX.. 


ChasR.Keyes  del. 


Heliotype  Printing  Cov!Bostori. 


PLATE  X. 


Page 

Arch.eocrinus  lacunosus  (Billings) 255 

Fig.  1.  Posterior  view  of  the  type  specimen.  (Museum  Geol.  Surv.,  Canada.) 

Arcii/Eocrixus  microbasalis  (Billings) 256 

2a.  Specimen  with  arms  and  stem.  (Coll.  John  Stewart.) 

2b.  Another  specimen.  (Same  collection.) 

2c.  Basal  aspect.  (Same  collection.) 

Arcii.eocrinus  pyriformis  (Billings) 255 

3a.  The  type  specimen.  (Museum  Geol.  Surv.,  Canada.) 

3b.  A crushed  specimen,  showing  the  arms.  (Same  collection.) 

Arcieeocrinus  desiderates  W.  R.  Billings 257 

4 a.  The  type  specimen  with  arms ; the  left  posterior  radius  in  front.  (Coll. 

W.  R.  Billings.) 

4 b.  Dorsal  aspect  of  the  calyx.  (Coll.  W.  and  Sp.) 

Diabolocrinus  hieroglyphicus  W.  and  Sp 252 

5a.  Dorsal  aspect  of  a large  specimen.  (Coll.  W.  and  Sp.) 

5b.  Side  view  of  the  same. 

5c.  Anal  side  of  a small  specimen.  (Same  collection.) 

(Figs.  2c  and  5a  are  drawn  with  anal  side  up.) 


Crinoidea  Camerata. 


Plate 


Ghas.R.Keyes  del. 


Heliotype  Printing  Go.  'Boston. 


OF  THE 

UNIVERSITY  of  ILLINCI3. 


PLATE  XI. 


Page 

Diabolocrinus  perplexus  W.  and  Sp 250 

Fig.  la.  Dorsal  view  of  a large  calyx,  showing  very  small  supplementary  pieces 
along  the  sides  of  the  radials  and  between  the  interradials. 

lb.  Ventral  aspect  of  the  same. 

Diabolocrinus  vesperalis  White 251 

lc.  Lateral  view  of  a specimen  in  which  no  supplementary  pieces  are  developed. 
lcl.  Lateral  view  of  a specimen  in  which  the  primary  interradials  are  completely 

separated  from  the  radials  by  supplementary  pieces.  (All  in  Coll.  W. 


and  Sp.) 

Biiaphanocrinus  subnodosus  (Walcott) 259 

2.  The  type  specimen.  (Mus.  Comp.  Zool.) 

Biiaphanocrinus  sculptus  (Miller) 260 

3.  A specimen  with  arms.  (Coll.  I.  H.  Harris.) 

Lyriocrinus  melissa  (Hall) 263 

4 a.  A specimen  with  arms.  (After  Hall.) 


4 b.  Dorsal  aspect  of  a large  specimen.  (Coll.  W.  and  Sp.) 

4c.  Ventral  aspect,  showing  portion  of  the  tegmen.  (Coll.  W.  F.  E.  Gurley.) 

4 d.  A smaller  specimen,  with  the  tegmen  preserved,  and  showing  the  anus. 

(Coll.  W.  and  Sp.) 

4e.  Lateral  view  of  the  calyx.  (Coll.  W.  F.  E.  Gurley.) 

4/.  A young  specimen  with  arms.  (Coll.  W.  and  Sp.) 

Lyriocrinus  dactylus  Hall  262 

5a  and  b.  The  types.  (Amer.  Mus.  Hat.  Hist.,  New  York.) 

5c.  Specimen  showing  the  pinnules.  (Mus.  Comp.  Zool.) 


Riiodocrinus  Wortiieni  Hall 220 

6.  A slightly  crushed  specimen  with  arms.  (Mus.  Comp.  Zool.) 

Rhodocrinus  nanus  M.  and  W 228 


7 a.  The  type  specimen,  lateral  view ; from  the  Burlington  Limestone. 
lb.  Ventral  aspect  of  the  same.  (Mus.  Comp.  Zool.) 


CR1N01DEA  CAMERA.1A. 


Plate  XI. 


Ghas.R.Keyes,  A.M.Westergren,  del. 


Heliotype  Printing  Go.  Boston. 


Um^nwms 


PLATE  XII. 


Page 

Riiodocrinus  Kirbyi  W.  and  Sp 226 

la.  Specimen  with  spreading  arms. 

lb.  Another  specimen  with  arms  and  column,  anterior  view, 
le.  Posterior  view  of  another  specimen. 

Id.  The  calyx,  posterior  view. 

Riiodocrinus  nanus  M.  and  W 228 

2a.  Anterior  view  of  a specimen  with  stem. 

2b.  Posterior  view  of  another  specimen. 

(Both  from  the  Kinderhook  group.) 

Rhodocrinus  Barrisi  Hall  . . 230 

3.  A small  specimen  with  arms. 

4 a.  A very  large,  nodose  specimen  ; dorsal  aspect  of  the  calyx. 

4 b.  Side  view  of  same  specimen. 

4 c.  Posterior  view  of  same. 

4 d.  Ventral  aspect  of  same. 

5a.  Lateral  view  of  another  specimen. 

5b.  Dorsal  aspect  of  same. 


Rhodocrinus  Barrisi,  var.  striatus  W.  and  Sp 231 

6.  Lateral  view  of  dorsal  cup. 

Riiodocrinus  Wortheni  Hall 220 

7a.  Specimen  with  arms. 

7b.  Dorsal  aspect  of  calyx. 

7c.  Ventral  aspect  of  same  specimen. 


Riiodocrinus  Wortheni,  var.  urceolatus  W.  and  Sp 221 

8a.  Posterior  view  of  the  calyx. 

8b.  Ventral  aspect  of  same  specimen. 

Riiodocrinus  watersianus  W.  and  Sp 221 

9.  Specimen  with  arms  and  stem. 

(All  the  specimens  are  in  the  collection  of  Wachsmuth  and  Springer.) 


Crinoidea  Camerata. 


Plate  XII. 


Chas.R.Keyes  del. 


KeJiOvyps  Printing  Co,Boston. 


library 

OF  THE 

UNIVERSITY  of  ILLINOIS, 


PLATE  XIII. 


Pagk 

Bhodocrinus  Whitei  Hall 223 

Fig.  la.  Dorsal  aspect  of  calyx.  (Coll.  W.  and  Sp.) 
lb.  Ventral  aspect  of  same  specimen. 

1 c.  Posterior  side  of  same. 

Bhodocrinus  truncatus  W.  and  Sp 231 

2a.  The  type  specimen,  lateral  view.  (Coll.  AY.  and  Sp.) 

2b.  Posterior  view  of  same. 

2c.  Dorsal  aspect  of  same. 

2d.  Ventral  aspect  of  another  specimen.  (Same  collection.) 

2e.  Side  view  of  same  specimen. 

2 f.  Side  view  of  a very  large  specimen.  (Same  collection.) 

Bhodocrinus  tuberculatus  AAr.  and  Sp 232 

3.  Side  view  of  the  type.  (Coll.  AV.  and  Sp.) 

4.  Side  view  of  a larger  and  more  nodose  specimen.  (Same  collection.) 

Bhodocrinus  AVachsmuthi  Hall 222 

5a.  A large  specimen  with  arms.  (Coll.  AV.  and  Sp.) 

5b.  Posterior  view  of  calyx.  (Same  collection.) 

5c.  Side  view  of  same  specimen. 

5d.  Dorsal  aspect  of  another  specimen.  (Same  collection.) 

Bhodocrinus  coxanus  AVorthen 222 

6.  The  type  specimen  ; lateral  view.  (Coll.  L.  A.  Cox.) 

7.  Another  specimen  of  this  species,  described  as  Bhodocrinus  polydactylus. 


(Same  collection.) 

Bhodocrinus  nodulosus  Hall 225 

8.  The  type  specimen.  (After  Hall.) 

Thysanocrinus  Halli  Lyon 196 


9a.  Dorsal  aspect  of  calyx.  (Coll.  Borden  Institute,  New  Providence,  Indiana.) 

9b.  An  abnormal  specimen.  (Same  collection.) 

Lampterocrinus  Tennesseensis  Boemer 208 

10a.  Posterior  view  of  the  calyx.  (Coll.  AV.  and  Sp.) 

105.  Ventral  aspect  of  same. 

10c.  Anterior  view  of  another  specimen.  (Same  collection.) 

10<L  Portion  of  the  stem. 

Thylacocrinus  Clarkei  AA7.  and  Sp 248 

11a.  The  type  specimen,  lateral  view.  (State  Cabinet  Nat.  Hist.  N.  Y.) 

115.  Infrabasal  disk,  showing  the  stellate  column  facet. 


Geinoidea  Camerata. 


PLATE  XIII. 


GhasR  Keyes,  A.M.Westergreri  del. 


Heliotype  Printing  Go.  Heston. 


LIBRARY 

OF  THE 

UNIVERSITY  of  ILLINOf^ 


PLATE  XIV. 


Gilbertsocrinus  typus  (Hall) 

Fig.  1.  Dorsal  aspect  of  a large  specimen  with  the  appendages  preserved  nearly 
entire.  From  the  Burlington  and  Keokuk  Transition  Bed. 

2.  Another  specimen  from  the  same  horizon  ; side  view. 

3.  A specimen  from  the  Upper  Burlington  Limestone  with  the  appendages  and 

portions  of  the  arms  preserved. 


Page 

242 


(All  specimens  in  the  collection  of  Wachsmuth  and  Springer.) 


Crinoidea  Camerata.  Plate  XIV. 


Chas.R.Keyes  del. 


Heliotype  Printing  Co.  Boston. 


UBRARV 

OF  TMF 

UNITOSITV  of  ILLINOIS 


PLATE  XV. 


Page 

Gilbertsocrinus  tuberosus  (Lyon  and  Cass) 239 

Fig.  1 a.  A large  specimen  showing  the  calycine  appendages. 
lb.  Another  specimen,  showing  the  appendages  and  arms. 

Gilbertsocrinus  dispansus  W.  and  Sp 240 

2a.  Ventral  aspect  of  a specimen,  with  calycine  appendages  and  arms  preserved. 

2b.  Dorsal  aspect  of  the  same  specimen. 

2 c.  Lateral  view  of  the  calyx. 

2d.  Ventral  aspect  of  the  same  specimen. 

Gilbertsocrinus  spinigerus  (Hall) 247 

3a.  The  type  specimen,  dorsal  aspect  of  the  calyx. 

3b.  Lateral  view  of  the  same  specimen. 

3c.  Ventral  aspect  of  the  same. 

Gilbertsocrinus  stellaris  De  Ivon,  and  Le  Hon 236 

4.  Side  view  of  a slightly  enlarged  specimen  from  Belgium.  (In  this  species, 

and  the  succeeding  one  from  England,  the  appendages  are  arranged  in  live 
pairs  of  separate  tubes  ; differing  from  most  of  the  American  species,  in 
which  those  of  adjoining  interradii  are  coalesced  for  some  distance  beyond 
the  calyx.) 

Gilbertsocrinus  calcaratus  Phillips 236 

5.  Figured  to  illustrate  the  differences  in  the  structure  of  the  genus  between 

European  and  American  forms.  Mountain  Limestone,  England. 

Rhodocrtnus  Whitei  Hall 223 

6a.  Side  view  of  a large  and  very  perfect  specimen. 

6b.  Dorsal  aspect  of  same  specimen. 

Bhodocrinus  Wachsmuthi  Hall 222 

7.  Anterior  side  of  the  calyx. 

(All  the  specimens  are  in  the  collection  of  Wachsmuth  and  Springer  except 
that  illustrated  by  figs.  3a,  b,  c,  which  is  in  the  Canada  Survey  Museum 
at  Ottawa.) 


Crinoidea  Camhrata 


iS®§ 


Plate  XV 


A.M.Westergren,  del. 


Heliotvpe  Printing  (io.,  Boston. 


LIBRARY 

uwbisitv™  mjNois 


PLATE  XVI. 

Page 

Gilbertsocrinus  tuberosus  (Lyon  and  Cass) 239 

ig.  1.  Specimen  with  stem. 

2.  Another  specimen  ; ventral  aspect. 

3.  Ventral  aspect  of  another  specimen  with  additional  branches  in  the  appen- 

dages. The  anal  opening  covered  over  by  a Platyceras  equilaterum. 

4.  Ventral  aspect  of  another  specimen. 

5.  Dorsal  aspect  of  calyx,  showing  the  bases  of  the  arms. 

6.  A crushed  specimen  with  appendages,  arms,  and  pinnules. 

(All  specimens  in  the  collection  of  Wachsmuth  and  Springer.) 


Crinoipea  Came  rata. 


Chas.K  Keyes  del. 


Heliotype  Printing  Co.,Boston. 


LIBRARY 

UNIVERSITY  of  ILLINOIS. 


PLATE  XVII. 


Page 

Gilbertsocrinus  reticulatus  (Hall) 244 

Fig.  la.  Dorsal  aspect  of  the  calyx. 

lb.  Lateral  view  of  another  specimen. 

Gilbertsocrinus  fiscellus  (M.  and  W.) 245 

2 a.  Anterior  view  of  calyx. 

2b.  Posterior  view  of  same. 

2c.  Ventral  aspect  of  same. 

2d.  Posterior  view  of  another  specimen,  in  which  the  appendages  next  to  the 


posterior  side  separate  within  the  calyx. 

Gilbertsocrinus  tenuiradiatus  (M.  and  W.) 246 

3.  Dorsal  aspect  of  a crushed  specimen,  showing  parts  of  the  appendages. 

Gilbertsocrinus  obovatus  (M.  and  W.) 241 


4a.  Side  view  of  calyx. 

lb.  Ventral  aspect  of  same.  (Figure  drawn  anal  side  up.) 

Gilbertsocrinus  tuberculosus  (Hall) 243 

5 a.  A specimen  with  arms,  appendages,  and  stem. 

5b.  Dorsal  aspect  of  another  specimen. 

5c.  Ventral  aspect  of  same. 

Gilbertsocrinus  tuberosus  (Lyon  and  Cass) 239 

6.  Dorsal  aspect  of  calyx. 

Gilbertsocrinus  ttpus  (Hall) 242 

la.  A large  specimen  from  the  Upper  Burlington  Limestone. 

lb.  Portion  of  the  arms,  showing  mode  of  bifurcation. 

(All  specimens  in  the  collection  of  Wachsmuth  and  Springer.) 


Ghas.R.Keyes  del. 


Heliotype  Printing  Co.  Boston. 


LIBRARY 

OF  THE 

UNIVERSITY  of  ILLINOIS. 


PLATE  XVIII. 

Page 

Ptychocrinus  parvus  (Hall) 199 

Fig.  la.  View  of  the  specimen  described  by  S.  A.  Miller  as  Glyptocrinus  annularis 
(?).  (Coll.  S.  A.  Miller.) 

lb.  Another  specimen  with  the  arms  better  preserved  (f).  (Same  collection.) 

2.  The  specimen  described  by  Wetherby  as  Glyptocrinus  ( Reteocrinus ) aracilis 
(2).  (Coll.  Mr.  Vaupel.) 

Ptychocrinus  splendens  (Miller) 198 

3a.  The  type  specimen  (f).  (Coll.  S.A.  Miller.) 

3b.  Another  specimen  (f).  (Same  collection.) 

Thysanocrinus  liliiformis  Hall 192 

4.  The  type  specimen.  (Museum  of  Cornell  University.) 

Thysanocrinus  occidentalis  (Hall) 194 

5a.  Side  view  of  calyx  (f).  (After  Hall.) 

5b.  Posterior  view  of  calyx.  (After  Hall.) 

5c.  Dorsal  aspect  of  calyx  (f).  (After  Hall.) 

Thysanocrinus  inornatus  (Hall) 193 

6a.  Anterior  view  of  calyx.  (Coll.  W.  F.  E.  Gurley.) 

6b.  Posterior  view  of  same  specimen. 

6c.  Ventral  aspect  of  same  (f). 

6cl.  A young  specimen,  probably  of  this  species.  (Same  collection.) 

Thysanocrinus  brachiatus  (Hall) 195 

7.  Dorsal  aspect  of  the  type  specimen ; the  matrix  removed  so  as  to  show  the 
pinnules  and  the  arrangement  of  the  plates.  (Am.  Mus.  Nat.  Hist.  N.  Y.) 

Idiocrinus  elongatus  W.  and  Sp 203 

8a.  The  type  specimen;  side  view.  (Coll.  W.  and  Sp.) 

8b.  Ventral  aspect  of  same  (|5). 

8c.  Another  view  of  the  ventral  disk  (f).  (Anal  side  to  the  right.  Coll.  W. 
and  Sp.) 

Idiocrinus  ventricosus  W.  and  Sp 205 

9a.  The  type  specimen  ; side  view.  (Same  collection.) 

9b.  Dorsal  aspect  of  the  dorsal  cup.  (Anal  side  to  the  left.  Same  collection.) 

Idiocrinus  immaturus  (Hall) 206 

10a.  The  type  specimen;  anterior  view.  (Am.  Mus.  Nat.  Hist.  N.  Y.) 

10J.  Posterior  view  of  same. 

,10c.  Dorsal  aspect  of  same.  (After  Hall.) 

Idiocrinus  tennesseensis  (Worthen) 206 

11.  The  type  specimen.  (Illinois  State  Collection.) 


CTilNOIDEA  Camerata. 


Plate  .XVIII. 


Ghas  R Keyes.  A.M.Westergren.  del. 


Heliotype  Printing  Go., Boston.. 


MmsnvZ* 


lM*ry 
Whois. 


PLATE  XIX. 


Page 

Siphonocrinus  nobilis  (Hall) 212 

g.  la.  Gutta  percha  cast  made  froni  a natural  mould.  (After  Hall.) 
lb.  The  quinquepartite  infrabasal  disk. 

2a.  Internal  cast,  showing  the  arrangement  of  the  ambulacra  upon  the  left  side. 

(Coll.  T.  A.  Green.) 

2b.  Lateral  view  of  a similar  cast,  showing  their  arrangement  at  the  right  side. 

(Same  collection.) 

2c.  Ventral  aspect  of  another  cast.  (Same  collection.) 

Siphonocrinus  armosus  McChesney 211 

за.  Left  side  of  an  internal  cast ; the  anal  tube  overlying  the  ambulacra,  and 

passing  over  to  the  anterior  side  of  the  calyx,  being  subtegmiual  to  the 
arm  regions.  (Same  collection.) 

зб.  Another  specimen,  showing  the  right  side  of  the  calyx.  (Same  collection.; 


3c.  Ventral  aspect  of  another  cast.  (Same  collection.) 

Siphonocrinus  pentagonus  W.  and  Sp 213 

4a.  The  type  specimen  ; lateral  view.  (Same  collection.) 

46.  Ventral  aspect  of  another  specimen.  (Same  collection.) 

Thysanocrinus  inornatus  (Hall) 193 

5.  Dorsal  aspect  of  specimen  with  portions  of  arms.  (Coll.  W.  and  Sp.) 

Hyptiocrinus  typus  W.  and  Sp * . . . . 201 


ба.  Dorsal  aspect  of  the  specimen  described  by  Miller  as  Cyphocrinus  Gorbyi. 

(After  Miller,  drawn  with  the  anal  side  down.) 

бб.  Lateral  view  of  calyx.  (Coll.  W.  and  Sp.) 

6c.  Ventral  aspect  of  calyx.  (Same  collection.) 


Crinoidea  Gamer ata. 


Plate  XIX. 


Chas.R. Keyes,  A.M.Westergren  del. 


Heliotype  Printing  Co.  Boston. 


PLATE  XX. 


Page 

Glyptocrinus  Dyeri  (Meek) 271 

Fig.  la.  A large  specimen  with  arms.  (Coll.  I.  H.  Harris.) 

lb.  Posterior  view  of  a large,  flattened  specimen  of  the  type  of  Gl.  Richardsoni 
Wetherby,  showing  the  fixed  pinnules.  (Coll.  W.  and  Sp.) 

1 c.  The  base,  showing  the  angles  of  the  axial  canal  to  be  interradial.  (Coll. 


Mr.  E.  H.  Vaupel.) 

Glyptocrinus  marginatus  Billings 275 

2.  The  type  specimen;  postero-lateral  view.  (Mus.  Geol.  Surv.,  Canada.) 

Glyptocrinus  Fornshelli  Miller 276 

3.  The  calyx  and  part  of  the  stem.  (Coll.  I.  H.  Harris.) 

Glyptocrinus  decadactylus  Hall 270 


4 a.  A very  large  specimen.  (After  Meek.) 

4 b.  Posterior  view  of  calyx.  (Coll.  I.  H.  Harris.) 

4c.  Ventral  aspect  of  a rather  small  specimen  (f).  (Coll.  E.  0.  Ulrich.) 

4 d.  Ventral  aspect  of  an  older  specimen  (f).  (Coll.  W.  and  Sp.) 

4e.  Portions  of  the  arms,  showing  covering-plates  (f).  (Same  collection.) 

Glyptocrinus  ramulosus  Billings 273 

5a.  One  of  the  type  specimens  ; lateral  view.  (Mus.  Geol.  Surv.,  Canada.) 

5b.  Another  type  specimen,  showing  the  ramifications  of  the  arms.  (Same 
collection.) 

Glyptocrinus  ornatus  Billings 274 

6re.  The  type  specimen;  anterior  view.  (Mus.  Geol.  Surv.,  Canada.) 

6b.  Posterior  view  of  same  specimen. 


Crtnoidea  Cambrata. 


Plate  XX 


Chas.R.Keyes.del. 


Heliotype  Printing  Co.  Boston. 


library 

UNIVERSITy  Of  ILLINOIS, 


PLATE  XXI. 


Page 

Periglyptocinus  Billingsi  W.  and  Sp 277 

Fig.  la.  Posterior  view  of  a specimen  with  arms  and  stem.  (Coll.  John  Stewart, 
now  in  the  Cauada  Survey  Museum  at  Ottawa.) 
lb.  Another  specimen  in  the  same  collection,  showing  the  left  postero-lateral 
ray  and  anal  interradius. 

Periglyptocrinus  priscus  (Billings) 278 

2.  The  type  specimen.  (Museum  Geol.  Surv.,  Cauada.) 

Glyptocrinus  Dyeri  (?) 271 

3 a-c.  Young  specimens,  probably  of  G.  Dyeri  (f). 

3d.  Type  of  Miller’s  P ycnocrinus  Shafferi  (f).  (Coll.  S.  A.  Miller.)  ....  272 
3e.  Type  of  Miller’s  P ycnocrinus  Shafferi,  var.  germanus  (f).  (Same  collection.) 

3 f.  A somewhat  larger  specimen  iff).  (Coll.  W.  and  Sp.) 

Glyptocrinus  decadacty'lus  Hall 270 

4 a.  Inner  floor  of  the  dorsal  cup  (f).  (Coll.  E.  O.  Ulrich.) 

4 b.  Interior  view  of  the  basal  cup  (f).  The  angles  of  the  axial  canal  directed 
interradially.  (Coll.  W.  and  Sp.) 

Glyptocrinus  Fornshelli  Miller 276 

5.  Interior  view  of  the  basal  cup  (p).  The  angles  of  the  axial  canal  directed 

radially.  (Coll.  I.  H.  Harris.) 

Glyptocrinus  Dyeri  Meek 271 

6.  Calyx,  showing  the  posterior  side  of  a large,  highly  ornamented  specimen. 

(Coll.  E.  0.  Ulrich.) 

Compsocrinus  miamiensis  S.  A.  Miller 518 

7 a.  The  type  specimen;  posterior  side.  (Coll.  I.  H.  Harris.) 
lb.  Anterior  view  of  another  specimen.  (Coll.  W.  and  Sp.) 

Compsocrinus  Harrisi  S.  A.  Miller 517 

8a.  One  of  the  type  specimens;  lateral  view  ( p ).  (Coll.  I.  H.  Harris.) 

8b.  Posterior  view  of  another  type  specimen  (f).  (Same  collection.) 


Crinoidea  Camerata. 


Plate  XXI 


3«. 


7a 


3d. 


3s 


Ghas.R  Keyes,  del. 


Heliotype  Hinting  Go.  Boston. 


PLATE  XXII. 


Page 

Mariacrinus  Warreni  Ringueberg 283 

Fig.  1.  The  type  specimen.  (Coll.  Dr.  E.  N.  S.  Ringueberg.) 

Mariacrinus  Carleyi  (Hall) 282 

2a.  Postero-lateral  view  of  calyx.  (Coll.  I.  H.  Harris.) 

2b.  Anterior  view  of  same  specimen. 

2c.  Ventral  aspect  of  the  same. 

Technocrinus  spinulosus  (Hall) 305 

3.  The  type  specimen.  (Am.  Mus.  Nat.  Hist.  N.  Y.) 

Melocrinus  bainbridgensis  H.  and  W 297 

4a.  The  type  specimen;  side  view.  (After  Hall  and  Whitfield.) 

4b.  Dorsal  aspect  of  same. 

4c.  The  arms.  (After  Hall  and  Whitfield.) 

Melocrinus  gracilis  W.  and  Sp 298 

5.  The  type  specimen ; side  view.  (Coll.  J.  M.  Clarke.) 

Melocrinus  Calvini  W.  and  Sp 300 

6.  The  type  specimen.  (Coll.  Prof.  S.  Calvin.) 

Melocrinus  Tiffanyi  W.  and  Sp 299 

7a.  The  type  specimen;  right  posterior  view.  (Coll.  A.  S.  Tiffany.) 

7b.  The  basals  of  same. 

Melocrinus  parvus  W.  and  Sp . . . 303 

8.  The  type  specimen;  anterior  view  (|*).  (Coll.  W.  and  Sp.) 

Melocrinus  oblongus  W.  and  Sp 300 

9.  Lateral  view  of  a very  elongate  calyx.  (Coll.  W.  and  Sp.) 

Melocrinus  obconicus  Hall 302 

10a.  Lateral  view  of  calyx.  (Same  collection.) 

10 b.  Ventral  aspect  of  another  specimen.  (Same  collection.) 

10c.  The  basals. 


Grinoidea  Camera!  a. 


Plate  XXII. 


Ghas.R.Keyes,  del. 


Heliotype  Printing  Co.  Boston. 


PLATE  XXIII. 

Page 

Meloceinus  nobilissimus  (Hall) 295 

Fig.  1.  The  type  specimen.  (Amer.  Mus.  Nat.  Hist.) 

2.  Diagram  showing  the  arrangement  of  the  plates. 

3.  Portion  of  one  of  the  radial  trunks,  showing  the  origin  of  the  arms.  (After 

Hall.) 

Meloceinus  paciiydactylus  (Hall) 296 

4.  The  structure  of  the  radial  trunks  and  the  origin  of  the  arms.  (After  Hall.) 

5.  The  type  specimen  of  “ Mariacrinus ” paucidactylus  Hall.  (After  Hall.) 

Maeiaceinus  plumosus  Hall  . .■ 284 

6.  The  type  specimen.  (After  Hall.) 

7.  Dorsal  cup  of  a larger  specimen.  (After  Hall.) 

Maceostyloceinus  oenatus  Hall 286 

8a.  The  type  specimen.  (After  Hall.) 

85.  One  of  its  radials,  enlarged. 

8c.  A portion  of  an  arm,  enlarged. 

Maceostyloceinus  fusibeachiatus  Ringueberg 291 

9.  The  type  specimen.  (Coll.  Dr.  E.  N.  S.  Ringueberg.) 

10.  A smaller,  somewhat  distorted  specimen.  (Same  collection.) 


Crinoidea  Cake sata. 


Plate  XXII 


f»as 


Chas.R.  Keyes,  A.M.Westergren  del.  Heliotype  Aiming  Co.  Boston. 


PLATE  XXIV. 


Pace 

Hadrocrinus  discus  Lyon 328 

Fig.  1.  The  type  specimen  ; dorsal  aspect.  (Coll.  S.  S.  Lyon.) 

Hadrocrinus  plenissimus  Lyon 328 

2a.  The  type  specimen ; dorsal  aspect.  (Coll.  S.  S.  Lyon.) 

2b.  Inner  floor  of  dorsal  cup.  (Same  collection.) 

Technocrinus  Andrewsi  Hall 306 

3.  The  type  specimen,  after  Hall.  (From  a gutta  percha  cast  made  from 
a natural  mould  in  sandstone.) 

Melocrinus  pachydactylus  (Hall)  296 

4 a.  The  type  specimen.  (After  Hall.) 

4 b.  Another  specimen.  (Am.  Mus.  Nat.  Hist.) 

Melocrinus  bainbridgensis  Hall  and  Whitf 297 

5.  The  specimen  described  by  S.  H.  Williams  as  Melocrinus  Clarkei.  (N.  Y. 

State  Cabinet  of  Nat.  Hist.) 

(?)  Stelidiocrinus  argutus  (Walcott) 280 

6.  The  type  specimen.  (After  Walcott.  Coll.  Mus.  Comp.  Zool.) 

Allocrinus  typus  W.  and  Sp 307 

la.  Side  view  of  one  of  the  types.  (Coll.  W.  and  Sp.) 

lb.  Basal  view  of  same  specimen. 

Allocrinus  Benedicti  S.  A.  Miller 308 

8a.  Side  view  of  calyx.  (Same  collection.) 

8b.  Basal  view  of  same  specimen. 


Grinoidea  Camera.'. pa. 


Plate  XXIV. 


Chas  R Keyes, del.  Heliotype  Printing  Go.  Boston. 


UT'iSV 

OF  THE 

UNIVERSITY  of  ILLINOIS- 


PLATE  XXV. 


Page 

Dolatocrinus  excavatus  W.  and  Sp 321 

'ig.  1.  Dorsal  aspect.  (Coll.  Victor  W.  Lyon.) 

Dolatocrinus  Marshi,  var.  iiamiltonensis  W.  and  Sp.  . . . 314 

2 a.  Dorsal  aspect.  (Coll.  Victor  W.  Lyon.) 

2b.  Ventral  aspect  of  the  same  specimen. 

Dolatocrinus  tuberculatus  W.  and  Sp 324 

3.  Dorsal  aspect.  (Victor  W.  Lyon.) 

Dolatocrinus  speciosus  Hall 323 

4 a.  Dorsal  aspect.  (Coll.  W.  and  Sp.) 

4 b.  Side  view  of  the  same  specimen. 

Dolatocrinus  major  W.  and  Sp 322 

5.  Dorsal  aspect.  (Coll.  Victor  W.  Lyon.) 

Dolatocrinus  Lyoni  W.  and  Sp 314 

6a.  Dorsal  aspect.  (Same  collection.) 

6b.  Ventral  aspect  of  another  specimen.  (Same  collection.) 

6c.  Side  view  of  the  same  specimen. 

6d.  Portion  of  the  tegmen,  showing  the  slits ; enlarged. 

Dolatocrinus  canadensis  Whiteaves 315 

7a.  Dorsal  aspect.  (After  Whiteaves.) 
lb.  Ventral  aspect  of  same  specimen. 

Stereocrinus  trtangulatus  Barris 325 

8a.  The  type  specimen.  (Museum  Davenport  Acad.  Nat.  Sci.) 

8b.  Side  view  of  same  specimen. 

Stereocrinus  Barrisi  W.  and  Sp 326 

9a.  Side  view  of  a fine  specimen.  (Same  collection.) 

9b.  Ventral  aspect  of  another  specimen.  (Coll.  W.  and  Sp.) 

Centrocrinus  pentaspinus  Lyon 309 

10a.  The  type  specimen  ; dorsal  view.  (Coll.  S.  S.  Lyon.) 

10A  Side  view  of  same  specimen. 

10c.  Side  view  of  another  specimen  in  the  Lyon  collection.  (Described  as 
Actinocri n us  multico runs.) 


Grinoidea  Gamer ata. 


Plate  XXV 


Chas.R  Keyes  del. 


Heliotype  Printing  Co,  Boston. 


LIBRARY 

OF  THE 

UNIVERSITY  of  ILLINOIS. 


PLATE  XXVI. 


Page 

Dolatocrinus  Marshi  Lyon 312 

Fig.  la.  The  type  specimen ; posterior  view.  (Coll.  S.  S.  Lyon.) 

lb.  Dorsal  aspect  of  same  specimen. 

lc.  Ventral  aspect  of  same. 

ld.  Inner  floor  of  the  inverted  basal  cup,  showing  its  derivation  from  3 plates. 

Dolatocrinus  glyptus  Hall 317 

2a.  The  type  specimen ; posterior  view.  (Am.  Mus.  Nat.  Hist.  N.  Y.) 

2b.  Basal  aspect  of  another  specimen.  (Coll.  J.  M.  Clarke.) 

Dolatocrinus  liratus  Hall 319 

3.  A somewhat  flattened  specimen.  (Am.  Mus.  Nat.  Hist.) 

Dolatocrinus  triadactylus  Barris 316 

4 a.  The  type  specimen ; anterior  view.  (Museum  Davenport  Acad.  Sci.) 

4b.  Another  specimen,  giving  a posterior  view  of  the  calyx.  (Same  collection.) 

4c.  Another  showing  the  dorsal  view  of  calyx.  (Coll.  W.  and  Sp.) 

4d.  Ventral  aspect  of  the  same  specimen. 

Dolatocrinus  icosidactylus  W.  and  Sp 319 

5a.  Dorsal  aspect  of  calyx.  (Coll.  V.  W.  Lyon.) 

5b.  Posterior  view  of  the  same  specimen. 

5c.  Ventral  aspect  of  same. 

5d.  Dorsal  aspect  of  another  specimen.  (Coll.  W.  and  Sp.) 

Dolatocrinus  lacus  Lyon 311 

Ga.  The  type  specimen ; anterior  view.  (Coll.  Sidney  S.  Lyon.) 

6b.  Dorsal  aspect  of  the  same  specimen. 

6c.  Ventral  aspect  of  same. 

Dolatocrinus  excavatus  W.  and  Sp 321 

7.  Inner  floor  of  the  ventral  disk.  (Coll.  V.  W.  Lyon.) 

8.  Inner  floor  of  basal  disk. 


Crinoidea  Camerata. 


Plate  ;<>;v 


i„ 


2 r. 


/ « 


'/  /, 


Ghas.R.Keyes  del. 


Heliotype  Printing , Co.  Boston. 


imur 

OF  THE 

UNIVERSITY  Of  ILLINOIS. 


PLATE  XXVII. 


Batockinus  graxdis  (Lyon) 

la.  Lyon’s  type  specimen,  — a fine  example  with  arms 

lb.  Portion  of  an  arm  from  near  the  top,  enlarged. 

2 a.  Lateral  view  of  the  calyx. 

2b.  Posterior  view  of  a specimen  with  anal  tube. 

Batocrixus  icosidactylus  Casseday 

3a.  Lateral  view  of  a large  specimen. 

3b.  Dorsal  aspect  of  another  specimen. 

3c.  Portion  of  the  anal  tube. 

Batocrixus  irregularis  Casseday 

4 a.  Posterior  view  of  the  calyx,  somewhat  enlarged. 

4 b.  Lateral  view  of  the  same  specimen. 

4 c.  Portion  of  the  anal  tube. 

Batocrixus  turbixatus  (Hall) 

5a.  Posterior  view  of  the  calyx. 

5b.  Lateral  view  of  another  specimen. 

5c.  Antero-lateral  view  of  a specimen  with  arms. 

Batocrixus  turbixatus,  var.  elegaxs  (Hall) 

6a.  Lateral  view  of  the  calyx. 

6b.  Posterior  view  of  the  same. 

Batocrixus  caxtoxexsis  Miller  and  Gurley 

7 a.  Posterior  view  of  a specimen,  showing  anal  tube. 

7b.  The  same  view  of  a specimen  with  arms. 

Batocrixus  clypeatus  (Hall) 

8a.  Lateral  view  of  the  calyx. 

8b.  The  same  of  another  specimen  (variety  B.  papillatus). 

8c.  Anterior  view  of  a more  wheel-shaped  specimen. 

8 cl.  Posterior  view  of  a young  specimen  (typical  form). 

8e.  Lateral  view  of  a small  specimen  with  arms  (variety  B.  inomatus .) 

(All  the  specimens  are  in  the  collection  of  Wachsmuth  and  Springer,  except 
that  of  Pig.  la,  which  is  in  the  Lyon  collection.) 


Page 

381 


368 


369 


375 


376 


383 


380 


Crinoidea  Camerata. 


Plate  xxvii. 


, A.M.Westergren.  del. 


Heliotype  Printing  Go.  Poston. 


PLATE  XXVIII. 


Page 

Lobocrinus  longirostris  (Hall) 442 

Fig.  la.  Anterior  view  of  a specimen  with  arms,  anal  tube,  and  column.  (Mus. 
Comp.  Zool.) 

lb.  Portion  of  an  arm  with  the  pinnules,  enlarged. 

1 c.  Anterior  view  of  the  calyx.  (Coll.  W.  and  Sp.) 

ld.  Posterior  view  of  the  calyx.  (Same  collection.) 

le.  A very  young  specimen.  (Same  collection.) 

Batocrinus  lepidus  (Hall) 372 

2.  Side  view  of  the  calyx,  showing  the  bifurcation  of  the  left  postero-lateral 

ray.  (Coll.  W.  and  Sp.) 

3.  Posterior  view  of  the  calyx.  (Same  collection.) 

Batocrinus  quasillus  Meek  and  Worthen 372 

4 a.  Side  view  of  the  calyx.  (Same  collection.) 

4 b.  Specimen  showing  the  anal  interradius.  (Same  collection.) 

Batocrinus  .equalis  (Hall) 371 

5.  Posterior  view  of  the  calyx.  (Same  collection.) 

6.  Specimen  with  arms.  (Mus.  Comp.  Zool.) 

Batocrinus  sub^qualis  (McChesney) 369 

la.  Fine  specimen  with  arms.  (Same  collection.) 

lb.  Portion  of  an  arm  with  the  pinnules,  enlarged. 

8a.  Lateral  view  of  the  calyx.  (Same  collection.) 

8b.  Posterior  view  of  the  same  specimen. 

D.  A specimen  with  portion  of  anal  tube,  and  showing  the  bifurcation  of  the 
right  postero-lateral  ray.  (Same  collection.) 

Batocrinus  tuberculatus  W.  and  Sp 379 

10a.  Posterior  view  of  the  type  specimen.  (Coll.  W.  and  Sp.) 

10 b.  Another  specimen,  showing  the  left  postero-lateral  ray.  (Same  collection.) 


Crinoidea  Camerata. 


Plate  XXVILI 


A.M.Westergren.  del. 


. Heliotype  Printing  Co.  Boston. 


PLATE  XXIX 


Page 

Dizygocrinus  dodecadactylus  (Meek  aud  Worthen) 432 

Fig.  la.  Lateral  view  of  the  calyx. 

lb.  Posterior  view  of  the  same. 

lc.  Ventral  aspect  of  same. 

Dizygocrinus  andrewsianus  (McChesney) 433 

2 a.  Posterior  view  of  the  calyx. 

2b.  Lateral  view  of  another  specimen. 

2c.  A specimen  with  arms,  showing  one  of  the  postero-lateral  rays. 

2d.  Posterior  side  of  a specimen  with  arms. 

Dizygocrinus  rotundus  (Yandell  and  Shum.) 431 

3a.  Dorsal  aspect  of  the  calyx. 

3b.  Ventral  aspect  of  the  calyx ; the  plates  but  slightly  convex. 

3c.  Ventral  aspect  of  a specimen  with  distinctly  convex  plates. 

3d.  Lateral  view  of  the  calyx. 

3e.  Another  specimen,  having  part  of  the  anal  tube  preserved. 

3f.  Side  view  of  a specimen  with  twenty  arms. 

3g.  A larger  specimen  with  twenty-two  arms. 

4.  Ventral  aspect  of  a more  discoid  specimen  (type  of  Actinocrimis  oblatus  Hall.) 

Batocrinus  laura  (Hall) 384 


5 a.  Large  specimen  with  arms. 

5b.  Anterior  view  of  the  calyx. 

5c.  Lateral  view  of  another  specimen. 

5d.  Posterior  view  of  a more  conical  specimen. 

Eutrochocrinus  Christyi  (Shumard) 409 

6.  A young  specimen  (f). 

Eutrochocrinus  Lovei  W.  and  Sp 412 

7.  A young  specimen  (\). 

Lobocrinus  ^quibrachiatus  (McChesney) 440 

8a.  Posterior  side  of  the  calyx. 

8b.  Lateral  view  of  another  specimen. 


Lobocrinus  ajquibrachiatus  var.  asteriscus  (M.  and  W.)  . . 441 

9a.  Dorsal  aspect  of  the  calyx  (anal  interradius  the  lower  one). 

%.  Ventral  aspect  of  the  calyx. 

(All  specimens  in  the  collection  of  Wachsmuth  and  Springer.) 


Crinoidea  Camerata. 


Plate  XXIX. 


A.M.Westergren  del. 


Heliotype  TPrintingJlo.  Boston. 


PLATE  XXX. 

Page 

Batocrinus  Macbridei  W.  and  Sp 376 

Fig.  1.  Specimen  with  arms,  stem,  and  cirri. 

2.  Another  specimen  with  arms  and  stem. 

3.  Ventral  aspect  of  calyx  (\). 

Batocrinus  mundulus  Hall 382 

4 a.  Posterior  view  of  the  calyx. 

4 b.  Lateral  view  of  the  same. 

5.  Specimen  with  arms  from  Bono,  Iud.,  probably  of  this  species. 

Batocrinus  poculum  S.  A.  Miller 378 

6.  Specimen  with  anal  tube,  arms,  and  stem.  ✓ 

Lobocrinus  Yandelli  (Shumard) 441 

7 a.  The  type  specimen,  showing  anal  side. 
lb.  Dorsal  aspect  of  the  same  specimen. 

Lobocrinus  robcjstus  W.  and  Sp 436 

8 a.  The  type  specimen ; antero-lateral  side. 

8b.  Posterior  side  of  the  same. 

Lobocrinus  Hageri  (McChesney) 445 

9.  Posterior  side  of  the  calyx. 

10.  Antero-lateral  side  of  another  specimen. 

Lobocrinus  spiniferus  W.  and  Sp 439 

11.  One  of  the  type  specimens,  showing  the  anterior  side. 

12.  Another  type  specimen,  showing  the  posterior  side. 

Macrocrinus  jucundus  (S.  A.  Miller) 451 

13.  Calyx  and  anal  tube ; anterior  side. 

14.  Specimen  with  arms  ; antero-lateral  side. 

Macrocrinus  verneuilianus  (Shumard) 450 

15.  Large  specimen  with  arms  and  anal  tube. 

16.  Another  specimen ; the  tube  somewhat  inflated. 

17.  Posterior  side  of  the  calyx;  the  plates  but  little  convex. 

18.  Anterior  side  of  the  calyx ; a very  large,  nodose  specimen. 

(All  the  specimens  in  the  collection  of  TVachsmuth  and  Springer,  except  that 
of  Fig.  7,  which  is  in  the  Lyon  collection.) 


Grinoidea  Camerata. 


Plate  XXX. 


/ 


&a 


<9  A 


J.  L.Ridgway.  A.M. West  erg  ren  deL 


Helictype  Printing  Co.  Boston. 


LIBRARY 

OF  THE 


PLATE  XXXI. 


Page 

Lobocrinus  Nashville  (Troost) 435 

. 1.  Fine  specimen  with  stem  and  anal  tnbe. 

Lobocrixus  NASHviLLiE  var.  subtractus  (White) 436 

2a.  Posterior  side  of  a specimen  with  stem  and  anal  tube. 

2b.  Portion  of  a deformed  stem  from  another  specimen. 

Lobocrinus  pyriformis  (Shumard) 437 


3a.  Anterior  view  of  the  typical  form ; part  of  stem  and  anal  tube  preserved. 

3 b.  Posterior  side  of  a varietal  form. 

3c.  Anterior  view  of  an  elongate  variety. 

3 cl.  Perfect  specimen  with  stem,  arms,  and  anal  tube. 

3e.  Section  of  an  arm  (enlarged),  showing  the  spinous  processes  along  the  sides 
of  the  free  brachials. 

Batocrixus  pistillus  M.  and  W 378 

4a.  Posterior  view  of  the  calyx. 

4 b.  Anterior  view  of  another  specimen. 


(All  the  specimens  in  the  collection  of  Wachsmuth  and  Springer.) 


Crinoidea  Games ata. 


Plate  XXXI. 


Ghas.R.  Keyes  del. 


Heliotype  Printing  Co.  Boston. 


LIBRARY 


- 


PLATE  XXXII. 

Page 

Eutrochocrinus  Christyi  (Shumarcl) 409 

Fig.  la.  Lateral  view  of  a specimen,  showing  arms,  stem,  and  anal  tube. 

lb.  A specimen  preserving  the  extremity  of  the  anal  tube ; viewed  from  above. 

1 c.  Posterior  view  of  the  calyx. 

Eutrochocrinus  Lovei  (W.  and  Sp.) 412 

2a.  Lateral  view  of  the  type  specimen. 

2b.  Anterior  view  of  the  calyx. 

Eutrochocrinus  Christyi  var.  trochiscus  (M.  and  W.)  . . . 410 

3.  Posterior  view  of  the  calyx. 

Eutrochocrinus  planodiscus  (Hall) 411 

4 a.  Ventral  aspect  of  the  calyx. 

4 b.  Dorsal  aspect  of  same ; basals  and  first  radials  broken  away. 


(All  specimens  in  the  collection  of  Wachsmuth  and  Springer.) 


Crinoidea  Camerata. 


Plate  77X11. 


Gtos.R.Keyes  del. 


Heliotype  Printing  Co.  Poston. 


PLATE  XXXIII. 


Page 

Dizygocrinus  originarius  W.  and  Sp 421 

la.  The  type  specimen. 

lb.  Specimen  with  one  arm  paired,  the  others  single. 

Eretmocrinus  intermedius  W.  and  Sp 404 

2a.  Side  view  of  a specimen  with  arms. 

2b.  Another  example. 

2c.  Another  specimen;  top  view,  showing  the  spatulate,  infolding  arms. 

Dizygocrinus  montgomeryensis  (Worthen) 428 

3.  Specimen  with  arms,  anal  tube,  and  stem;  from  Crawfordsville,  Ind. 

4.  Another  specimen  with  arms  (all  paired  but  one)  ; from  Keokuk,  Iowa. 

Dizygocrinus  montgomeryensis  var.  unibrachiatus  W.  and  Sp.  429 

5a.  A somewhat  abnormal  specimen  with  arms  and  stem.  (Coll.  L.  A.  Cox.) 

5b.  Another  specimen  with  arms.  (Same  collection.) 

5c.  Posterior  view  of  another  specimen. 

Dizygocrinus  indianensis  L.  and  C 415 

Get.  Postero-lateral  side  of  a specimen  with  arms. 

66.  Calyx  of  another  specimen,  exposing  anal  side. 


Dizigocrinus  indianensis  var.  simplex  W.  and  Sp 415 

7.  Anterior  view  of  a specimen  with  arms. 

Dizygocrinus  cantonensis  W.  and  Sp 423 


8a.  Specimen  with  portions  of  the  arms,  and  showing  anal  tube. 
86.  Another  specimen,  showing  the  arms  and  anal  tube. 


Dizygocrinus  biturbinatus  (Hall) 427 

9.  Lateral  view  of  the  calyx. 

Dizygocrinus  Whitei  W.  and  Sp 419 


lOa.  Specimen  with  arms  from  the  Keokuk  group  of  Bono,  Ind. 

106.  Lateral  view  of  the  calyx.  (Same  locality.) 

11.  Posterior  view  of  the  calyx.  (Specimen  from  the  Warsaw  limestone  of 

Kentucky.) 

Dizygocrinus  facetus  Miller  and  Gurley  418 

12.  Specimen  from  Canton,  Ind.,  showing  anal  interradius. 

(All  specimens  in  the  collection  of  Wachsmuth  and  Springer,  unless  other- 
wise stated.) 


OR  1 NO  IDEA  CAMBRATA. 


Plate  XXXIII 


Chas.R.Keyes  del. 


Heliotype  Printing  Co.  Boston. 


Crinoidea  Camerata. 


Plate  XXXIV 


J7l 


J.L.Ridgway,  A.M .Westergren  del. 


Heliotype  Printing  Co.  Boston. 


PLATE  XXXIV. 


Page 

Eretmocrinus  calyculoides  (Hall) 395 

Eig.  la.  Lateral  view  of  a specimen  having  the  lower  part  of  the  arms  preserved. 
lb.  Opposite  view  of  the  specimen,  showing  anal  tube. 

2.  A specimen  showing  the  paddle-shaped  tips  of  the  arms. 

3.  Lateral  view  of  the  calyx,  showing  the  excentric  position  of  the  anal  tube. 

4.  Showing  the  curvature  of  the  anal  tube. 

Eretmocrinus  granuliferus  W.  and  Sp 390 

5a.  Lateral  view  of  the  type  specimen. 

5b.  Opposite  side  of  the  specimen,  showing  the  paddle  shaped  arms  and  anal 
tube. 

5c.  A detached  plate  showing  surface  ornamentation. 

Eretmocrinus  calyculoides  var.  nodosus  W.  and  Sp 396 

6.  Posterior  side  of  the  type  specimen. 

7.  A specimen  showing  the  anal  side. 

8.  Lateral  view  of  a very  elongate  specimen. 

Eretmocrinus  pr^gravis  S.  A.  Miller  405 

9.  Lateral  view  of  the  calyx. 

10.  Posterior  view  of  another  specimen. 

Gennjeocrinus  kentuckiensis  (Shum.)  548 

11.  Dorsal  aspect  of  the  calyx. 

12.  Eight  postero-lateral  side  of  another  specimen. 

13.  Aspect  of  the  ventral  disk. 


Genn.focrinus  eucharis  (Hall)  549 

14.  Portion  of  the  dorsal  cup 

Acacocrinus  americanus  W.  and  Sp 515 

15a.  Anterior  side  of  the  type  specimen. 

■ 15A  Posterior  side  of  the  same  specimen. 

Acacocrinus  Elrodi  W.  and  Sp 515 


16.  The  type  specimen. 


Page 

Aorocrinus  elegans  (S.  A.  Miller) 480 

Fig.  17a.  Posterior  side  of  the  type  specimen. 

176.  Ventral  aspect  of  the  same. 

Lobocrinus  inflatus  (Rowley  and  Hare) 444 

18a.  Anterior  view  of  the  type  specimen. 

186.  Lateral  view  of  the  specimen  described  by  Rowley  and  Hare  as  Batocrinus 
bulbosus. 

Dizygocrinus  Gurleyi  (S.  A.  Miller) 422 

19.  The  type  specimen. 

(All  the  specimens  are  in  the  collection  of  Wachsmuth  and  Springer,  except 
those  represented  by  Figs.  18a  and  186,  which  are  in  the  possession  of  Mr. 

R.  R.  Rowley,  and  Fig.  19,  which  is  owned  by  Mr.  F.  A.  Sampson.) 


Crinoidea  Camerata. 


Plate  XXXV. 


J.L.Ridgway  del 


Heliotype  Priming  Co.  Boston. 


PLATE  XXXV. 


Page 

Macrocbinus  Konincki  (Shumard) 447 

Fig.  1.  Specimen  with  anal  tube,  arms,  and  stem.  (Mus.  Comp.  Zool.) 


2.  Calyx,  showing  anal  side. 

3.  Another  specimen,  showing  anterior  side. 

Macrocrinus  lagunculus  (Hall) 453 

4.  Calyx,  postero-lateral  side. 

Dizygocrinus  indianensis  (Lyon) 415 


5.  The  arms  of  the  two  posterior  rays  nearly  all  paired ; those  of  the  three  an- 


terior rays  mostly  single  in  the  specimen. 

Dizigocrinus  decoris  (Miller) 420 

6.  Calyx,  in  a side  view. 

Dizygocrinus  euconus  (Meek  and  Worthen) 430 


7 a.  Calyx,  showing  the  postero-lateral  ray,  and  the  anal  interradius.  (A.  speci- 
men from  Taylor  Co.,  Ky.) 
lb.  Dorsal  aspect  of  the  same  specimen. 

Dizygocrinus  mutabilis  W.  and  Sp 429 

8.  Anterior  side  of  the  calyx. 

9.  Specimen  with  arms  in  a side  view. 

10.  Specimen  with  anal  tube,  and  most  of  the  arms  paired. 

11.  Specimen  in  which  one  half  of  the  arms  are  single. 

Dizygocrinus  Wiiitei  var.  didactylus  W.  and  Sp 420 

12.  Specimen  with  the  arms  all  paired. 

13.  Specimen  in  which  most  of  the  arms  are  single. 

Dizygocrinus  oeiginarius  var.  adultus  W.  and  Sp 422 

14.  Specimen  with  most  of  the  arms  paired. 

15.  Another  in  which  most  of  the  arms  are  single. 

Dizygocrinus  unionensis  (Worthen)  . 424 

16.  Anterior  side  of  calyx. 

17.  Anal  side  of  a crushed  specimen. 

18.  Side  view  of  another  specimen. 

19.  Posterior  side  of  a specimen  with  arms. 

20.  Another  specimen,  showing  posterior  side. 


Page 

Dizygocrinus  unionensis  var.  divalis  (S.  A.  Miller) 425 

Fig.  21.  Specimen  with  arms,  showing  anterior  side;  the  arms  alternately  paired. 

22.  Side  view  of  the  calyx. 

23.  Dorsal  aspect  of  a specimen  in  which  all  the  arms  are  jiaired. 

24.  Specimen  with  some  of  the  arms  paired. 

(All  specimens  in  the  collection  of  Wachsmuth  and  Springer,  unless  other- 
wise stated.) 


/ 


PLATE  XXXVI. 


Page 

Eretmocrinus  remibrachiatus  var.  expansus  W.  and  Sp.  . . . 390 

Fig.  1.  Ventral  aspect  of  a large  specimen,  showing  the  folding  of  the  arms.  The 
radial  trunk  of  an  Eucladocrinus  millebrachiatus  lying  on  top. 

Eretmocrinus  clio  (Hall) 393 

2a.  Specimen  with  arms  and  column. 

2b.  Posterior  side  of  the  calyx. 

Eretmocrinus  neglectus  (Meek  and  Worthen)  . 394 

3.  Anterior  side  of  the  calyx. 

Eretmocrinus  cl<elia  (Hall)  398 

4 a.  Specimen  with  arms  and  column. 

4 b.  Side  view  of  a somewhat  crushed  specimen. 

Eretmocrinus  corbulis  (Hall) 399 

5a.  Ventral  aspect  of'the  calyx. 

5b.  Dorsal  aspect  of  the  same. 

5c.  Lateral  view  of  another  specimen. 

6.  Fine  specimen  with  arms. 

Eretmocrinus  leucosia  (Hall) 401 

7a.  Specimen  with  part  of  arms  (basals  and  radials  not  preserved). 

7b.  Posterior  side  of  the  calyx. 

7c.  Dorsal  aspect  of  the  same. 

Macrocrinus  gemmiformis  (Hall) 419 

8.  Posterior  side  of  the  calyx. 

Eretmocrinus  rugosus  W.  and  Sp 402 

9a.  Posterior  side  of  the  type  specimen. 

9 b.  Ventral  aspect  of  the  calyx.  (Same  specimen.) 

9c.  The  base  of  the  same  specimen. 

Eretmocrinus  minor  W.  and  Sp 391 

10a.  Posterior  side  of  the  type  specimen. 

106.  Antero-lateral  side  of  another  specimen. 

Eretmocrinus  depressus  AV.  and  Sp 392 

11a.  Posterior  side  of  the  type  specimen. 

116.  Posterior  side  of  a smaller  specimen,  with  more  convex  plates. 

(All  the  specimens  in  the  collection  of  AVachsmuth  and  Springer.) 


Crinoidea  Gamer  ata. 


Plate  XXXVI. 


A.M.Westergren.  del. 


Heliotype  Printing  Co.  Poston. 


'UlNOls. 


PLATE  XXXVII. 


Page 

Eretmocrixus  remibrachiatus  var.  expaxsus  W.  and  Sp.  . . . 390 

. la.  Specimen  from  the  Burlington  and  Keokuk  transition  bed ; dorsal  aspect. 
lb.  Side  view  of  the  calyx;  from  same  bed. 

Eretmocrixus  remibrachiatus  (Hall) 388 

2 a.  Lateral  view  of  a specimen  from  the  Upper  Burlington  Limestone. 

2b.  Another  example  from  the  same  bed. 

Eretmocrhstus  magxificus  Lyon  and  Cass 386 

3.  A large  specimen,  with  rows  of  angular  nodes  following  the  rays  and  their 
subdivisions. 

Eretmocrixus  ramulosus  (Hall) 387 

4a.  Posterior  side  of  a large  calyx  from  Tennessee. 

4 b.  Dorsal  aspect  of  a highly  ornamented  specimen  from  Iowa. 

5a.  Arm  fragment,  probably  belonging  to  this  species  (from  Tennessee). 

5b.  Cross-section  of  it. 

5c.  Upper  portion  of  another  arm  fragment  from  the  same  locality. 

5d.  The  cross-section. 

Eretmocrixus  matuta  (Hall) 396 

6a.  Specimen  with  arms  ; the  anal  tube  bent  outward. 

6b.  Specimen  showing  the  natural  curving  of  the  anal  tube. 

6c.  A large  calyx. 

Eretmocrixus  coroxatus  (Hall) 403 


7a.  Dorsal  aspect  of  the  calyx. 

7b.  Anterior  side  of  same. 

7c.  Ventral  aspect  of  another  specimen. 

Macrocrixus  carica  (Hall) 448 

8.  Anterior  side  of  the  calyx. 

Eretmocrixus  clio  (Hall) 393 

9a.  Anterior  side  of  the  calyx. 


9b.  Ventral  aspect  of  a more  lobate  specimen. 

(All  specimens  in  the  collection  of  Wachsmuth  and  Springer.) 


Crinoidea  Camerata. 


Plate  XXXV 


Ghas.R. Keyes  del. 


Heliotype  Printing  Co.  Boston. 


LIBRARY 

UWVERSITF/,HfE|l„N0,, 


A 


PLATE  XXXVIII. 


Page 

Agaricocrixus  convexus  (Hall) 508 

Fig.  la.  Side  view  of  tlie  calyx,  and  portions  of  the  arms. 

1&.  Ventral  aspect  of  the  calyx. 

Agaricocrixus  brevis  (Hall) 511 

2 a.  A fine  specimen  with  arms. 

2b.  Ventral  aspect  of  the  calyx. 

2c.  Posterior  side  of  the  calyx. 

2d.  Dorsal  aspect  of  the  calyx. 

2e.  Side  view  of  the  calyx. 

Agaricocrixus  fiscellus  (Hall) 512 

3a.  Dorsal  view  of  the  calyx. 

3b.  Ventral  aspect  of  the  same  specimen. 

3c.  Postero-lateral  side  of  same. 

Agaricocrixus  pyramidatus  (Hall) 512 

4 a.  Specimen  with  arms. 

4 b.  Dorsal  aspect  of  the  calyx. 

4c.  Ventral  aspect  of  the  calyx. 

5a.  Posterior  side  of  a young  specimen. 

5b.  Dorsal  view  of  same. 

5c.  Ventral  aspect  of  same. 

Agaricocrixus  plaxocoxvexus  (Hall) 503 

6a.  Dorsal  view  of  the  calyx. 

6b.  Side  view  of  another  specimen. 

6c.  Ventral  aspect  of  same. 

Agaricocrixus  stellatus  Hall 508 

7a.  Dorsal  view  of  a specimen  with  arms. 

7b.  A small  specimen  with  arms. 

7c.  Dorsal  aspect  of  the  calyx. 

7 d.  Another  specimen,  showing  the  anal  side. 

7c.  The  same,  showing  the  ventral  aspect  of  the  calyx. 

(All  figures  from  specimens  in  the  collection  of  Wachsmuth  and  Springer.) 


Crinoidea  Camerata. 


Plate  XXXV11I. 


A.M  .West  ergreri  del. 


Heliotype  Printing  Go.  Boston. 


LIBRARY 

•***»?**». 


. 


PLATE  XXXIX. 

Page 

Agaricoceixus  Coreyi  (L.  and  C.) 510 

g.  la.  Basal  view  of  the  type  specimen.  (Lyon  collection.) 
lb.  Side  view  of  the  same. 

Agaricocrixus  crassus  Wetherby 499 

2 a.  Side  view  of  a large  specimen.  (Coll.  L.  A.  Cox.) 

2b.  Dorsal  aspect  of  the  same  specimen. 

Agaricocrixus  excavatus  Hall 491 

3.  Side  view  of  a specimen  with  greatly  protruding  anus.  (Coll.  W.  and  Sp.) 

4.  Dorsal  aspect  of  another  specimen.  (Same  collection.) 

5.  Dorsal  aspect  of  another.  (Same  collection.) 

Agaricocrixus  xodulosus,  var.  Macadamsi  Worthen  ....  498 

C.  Side  view  of  a large  specimen.  (Same  collection.) 

Agaricocrixus  coxicus  W.  and  Sp.  . 501 

7.  A fine  specimen  with  Myzostoma  (?)  cysts  on  two  arms. 

8.  Posterior  view  of  the  calyx.  (Both  specimens  in  the  coll.  W.  and  Sp.) 

Agaricocrixus  Worthexi  Hall 490 

9.  Dorsal  aspect  of  a specimen  in  which  the  second  costals  are  produced  into 

large  nodes.  (Coll.  L.  A.  Cox.) 


Crinoidea  Camerata. 


Plate  XXXIX 


A.M.Weatergren  del. 


Heliotype  Printing  Go.  Poston. 


PLATE  XL. 


Page 

Agaricocrinus  splendens  S.  A.  Miller 495 

Fig.  1 a.  A large  specimen  with  arms  and  stem. 
lb.  Dorsal  aspect  of  another  specimen. 

1 c.  Ventral  aspect  of  the  calyx. 

(?)  Agaricocrinus  nodulosus  Worthen 497 

2.  Dorsal  aspect  of  a very  smooth  specimen  with  portions  of  the  arms,  from 
Canton,  Ind. 

Agaricocrinus  elegans  Wetlierby 500 

3a.  Dorsal  aspect  of  a specimen  from  Hamilton,  111. 

3b.  Ventral  aspect  of  the  same. 

Agaricocrinus  crassus  Wetlierby 499 

4.  Tegmen  of  a small  specimen  from  Tennessee ; the  food  grooves  of  the  pos- 
terior rays  covered  by  large  alternate  plates. 

Agaricocrinus  Wortheni  Hall 490 

5a.  Posterior  side  of  a large  specimen. 

5b.  Anterior  side  of  the  same. 

5c.  Dorsal  aspect  of  same. 

5d.  Ventral  aspect  of  same. 

Agaricocrinus  americanus,  var.  tuberosus  (Hall) 489 

6.  Dorsal  aspect  of  the  calyx. 


(All  the  specimens  in  the  collection  of  Wachsmuth  and  Springer,  except  that  of 
Fig.  5,  which  is  in  the  Museum  of  Comparative  Zoology.) 


3R1N0IDEA  CAMERATA. 


Plate  XL 


/ c 


. M.V/ssr.ergren  del. 


Heliotype  Priming  Cc.  Boston. 


r' 


LjBRARy 

THE 


PLATE  XLI. 


Page 

Agaricocrinus  inflatus  Hall 502 

. la.  A large  specimen  with  arms  (the  arms  slightly  restored.) 

lb.  Posterior  side  of  the  calyx. 

lc.  Dorsal  aspect  of  another  specimen. 

ld.  The  summit  of  the  tegmen. 

Agaricockinus  bullatus  Hall 493 

2 a.  Specimen  with  arms  and  stem. 

2 b.  Dorsal  aspect  of  a large  calyx. 

2c.  Ventral  aspect  of  same. 

2 d.  Inner  floor  of  dorsal  cup. 

Agaricocrinus  gracilis  M.  and  W 513 

3a.  A large  specimen  with  arms. 

3b.  Posterior  side  of  calyx. 

3c.  Dorsal  aspect  of  same. 

Agaricocrinus  bellatrema  Hall 506 

4 a.  A specimen  with  portions  of  the  arms. 

4 b.  Posterior  side  of  the  calyx  with  one  arm  attached. 

4c.  Posterior  side  of  a smaller  specimen. 

4 d.  Side  view  of  a large  specimen. 

Agaricocrinus  bellatrema,  var.  major  W.  and  Sp 507 

5.  Ventral  aspect  of  a very  nodose  specimen. 

(All  specimens  in  the  collection  of  Wachsmuth  and  Springer.) 


Crinoidea  Camerata. 


Plate  XLI 


Ghas.R.  Keyes  del. 


Heliotype  Printing  Gc.  Soston. 


4. 


PLATE  XLII. 


Page 

Agaricocrinus  americanus  (Roemer) 488 

Fig.  1.  Specimen  with  arms,  from  Indiana. 

2a.  Posterior  side  of  the  calyx  (specimen  from  Tennessee). 

2b.  Anterior  side  of  another  specimen  (from  the  same  locality). 

Agaricocrinus  Wiiitfieldi  Hall 496 

3.  Ventral  aspect  of  the  calyx.  (Illinois  State  collection.) 

Agaricocrinus  americanus,  var.  tuberosus  (Hall) 489 

4.  Dorsal  aspect  of  the  calyx. 

Dorycrinus  cornigerus  (Hall) 458 

5.  Specimen  with  arms  and  stem. 

6.  Postero-lateral  view  of  calyx. 

Dorycrinus  quinquelobus  Hall 460 

7.  Side  view  of  the  calyx ; the  spines  broken  away. 

8.  Lateral  view  of  a specimen  with  arms. 

9.  Posterior  side  of  calyx  ; the  spines  intact. 

Dorycrinus  subturbinatus  Meek  and  Worthen 466 

10a.  Antero-lateral  view  of  the  calyx. 

105.  Posterior  view  of  the  calyx. 

Aorocrinus  Cassedayi  (Lyon) 483 

11a.  Ventral  aspect  of  the  type  specimen.  (Lyon  collection.) 

115.  Posterior  side  of  the  same. 

12.  Side  view  of  a specimen  from  Alpena,  Mich. 

Aorocrinus  concavus  ( Meek  and  Worthen) 482 

13a.  Dorsal  aspect  of  the  type  specimen.  (Mus.  Comp.  Zool.) 

135.  Ventral  aspect  of  the  same. 

13c.  Side  view  of  same. 

Alloprosallocrinus  conicus  Lyon  and  Cass.  407 

14a.  Anterior  view  of  the  calyx. 

145.  Posterior  view  of  the  same. 

14c.  Dorsal  aspect  of  same. 


(All  specimens  in  the  collection  of  Wachsmuth  and  Springer,  unless  otherwise  stated.) 


Or  ora  idea  Camerata. 


Plate  XL! 


A.M.Westergren  del. 


Heliotype  Printing  Co.  Boston. 


°F  TH£ 


mivusity 


\ 


PLATE  XLIII. 


Page 

Dorycrinus  misstssippiensis  F.  Eoemer 455 

Fig.  1.  Specimen  with  arms  and  stem.  (Coll.  Lisbon  A.  Cox.) 

Dorycrinus  Gouldi  (Hall) 456 

2.  Large  specimen  with  arms  and  stem.  (Coll.  W.  and  Sp.) 

3.  A young  specimen  with  arms.  (Same  collection.) 

Aorocrinus  spinosulus  (Hall) 478 

4.  Specimen  with  arms.  (Coll.  L.  A.  Cox.) 

Dorycrinus  coenigeeus  (Hall) 458 

5.  Calyx,  showing  the  anal  side.  (Coll.  W.  and  Sp.) 

Dorycrinus  missouriensis  (Shumard) 463 

6.  Posterior  side  of  the  calyx  with  most  of  the  spines  intact.  (Same  collection.) 

Agaricocrinus  nodulosus  Worthen 497 

7a.  Dorsal  aspect  of  the  calyx.  (Same  collection.; 

75.  Ventral  aspect  of  the  calyx. 

Agaricocrinus  Whitfieldi  Hall 496 

8a.  Dorsal  aspect  of  the  type  specimen.  (Illinois  State  collection.) 

85.  Ventral  aspect  of  the  same  specimen. 

Agaricocrinus  nodosus  Meek  and  Worthen 493 

9.  Calyx  and  portion  of  the  arms.  (Coll.  W.  and  Sp.) 


Crinoidea  Camerata. 


Plate  XLIII 


J.L.Ridgway  del 


Heliotjpe  Printing  Go.  Boston. 


PLATE  XLIV. 


Page 


Dorycrinus  intermedius  Meek  and  Worthen 461 

Fig.  1.  Specimen  with  arms,  spines,  and  stem. 

Dorycrinus  mississippiensis  Roemer 455 

2.  Posterior  side  of  the  calyx. 

3.  Ventral  aspect  of  a specimen  with  long  spines. 

Dorycrinus  Gouldi  (Hall) 456 


4.  A specimen  having  the  arms  and  portions  of  the  spines  preserved  (from 

Indian  Creek,  Ind.) 

5.  Anterior  view  of  the  calyx.  (Specimen  from  Kentucky.) 

Dorycrinus  cornigerus  (Hall) 458 

6.  Dorsal  aspect  of  the  calyx. 

7.  Ventral  aspect  of  another  specimen. 

Aorocrinus  spinosulus  (Hall) 478 

8a.  Posterior  side  of  the  calyx. 

8 b.  Ventral  aspect  of  the  same  specimen. 

Eretmocrinus  remibrachiatus,  var.  expansus  W.  and  Sp.  . . . 390 

9.  A large  specimen,  showing  the  calyx,  anal  tube,  and  the  infolding  of  the 
arms. 

(All  the  specimens  in  the  collection  of  Wachsmuth  and  Springer.) 


GR I NO  IDEA  CAMERATA. 


Plate  xliv. 


'/ 


J L.Ridgway  del 


Heliotype  Printing  Co.  Boston. 


Grinoidea  Camerata. 


PLATE  XLV 


Chas.R.Keve--  del 


Heliotjpe  Printing  Go.  Boston. 


PLATE  XLY. 


Page 


Aorocrinus  radiatus  W.  and  Sp 472 

Fig.  1.  A specimen  with  arms  ; anterior  side. 

Aokocrinus  iielice  (Hall) 481 

2.  Posterior  view  of  the  type  specimen.  (After  Hall.) 

Aorocrinus  parvibasis  W.  and  Sp 473 

3a.  Specimen  with  arms  from  the  anterior  side. 

35.  Posterior  view  of  the  calyx. 

Aorocrinus  immaturus  W.  and  Sp 471 


4a.  Lateral  view  of  specimen  with  part  of  the  arms,  and  portions  of  stem  and 


cirri  preserved. 

4 b.  Posterior  view  of  another  specimen. 

Aorocrinus  helice  (?) 481 

5.  Anterior  view;  from  a gutta-percha  cast  made  in  the  natural  mould. 

Aorocrinus  canaliculatus  M.  and  W 475 

6a.  Anterior  view  of  the  type  specimen.  (After  Meek  and  Worthen.) 

6b.  Posterior  view  of  the  same.  (After  Meek  and  Worthen.) 

Aorocrinus  subaculeatus  (Hall) 476 

7a.  Anterior  view  of  the  calyx. 

7b.  Posterior  side  of  the  same.  (After  Hall.) 


Dorycrinus  unicornis  (0.  and  Sh.) 468 

8a.  Anterior  view  of  a specimen  with  arms. 

8b.  The  same  view  of  a smaller  specimen  with  part  of  the  stem. 

8c.  Ventral  aspect  of  a large  calyx. 

8 d.  Dorsal  aspect  of  another  large  calyx. 

8e.  Anterior  view  of  a young  specimen. 

9.  Posterior  view  of  the  form  described  by  Hall  as  Actinocrinus  tricornis. 

10.  The  form  described  by  Hall  as  Actinocrinus  pendens  ; anal  side. 

Aorocrinus  parvus  (Shumard) 477 

11a.  Specimen  with  arms  and  stem. 

115.  Posterior  side  of  calyx  of  a large  specimen. 


Page 

Dorycrinus  unispina  (Hall) 467 

Fig.  12.  Specimen  with  an  unusually  large  spine  and  portions  of  the  arms. 

Dorycrinus  missouriensis  (Shumard) 463 


13a.  Anterior  view  of  the  calyx  with  spines  intact. 

13 b.  Ventral  aspect  of  the  same  specimen. 

13c.  Posterior  view  of  another  specimen. 

14.  An  abnormal  specimen  ; posterior  side. 

Dorycrinus  Rcemeri  M.  and  W 464 

15a.  Anterior  view  of  the  calyx. 

15 b.  Posterior  view  of  another  specimen. 

(All  specimens,  except  6 and  lb,  in  the  collection  of  Wachsmuth  and  Springer.) 


PLATE  XLVI. 


Page 

(?)  Periechocrinus  Whitei  (Hall) 530 

Pig.  1.  A very  large  specimen  from  the  Upper  Burlington  limestone.  (Coll.  W, 
and  Sp.) 

2.  A smaller  specimen  from  the  same  bed.  (Same  collection.) 

3.  Side  view  of  the  calyx.  (Same  horizon,  and  same  collection.) 

(?)  Periechocrinus  tenuidiscus  (Hall) 531 

4.  Lateral  view  of  the  dorsal  cup.  (Same  collection.) 

Agaricocrinus  Sampsoni  S.  A.  Miller 505 

5.  The  type  specimen.  (Coll.  F.  A.  Sampson.) 

Lobocrinus  .jequibrachiatus  McChesney 440 

6a.  Specimen  with  only  eighteen  arms.  (Coll.  W.  and  Sp.) 

6b.  Ventral  aspect  of  the  same  specimen. 

Batocrinus  rotadentatus  Bowley  and  Hare 374 

7.  The  type  specimen,  showing  the  dorsal  cup.  (Coll.  B.  B.  Bowley.) 

Batocrinus  Calvini  Bowley 373 

8a.  Side  view  of  the  type  specimen.  (Coll.  B.  B.  Bowley.) 

8b.  Another  view  of  the  calyx,  showing  the  anal  interradius  to  the  left. 

Dizygocrinus  euconus,  var.  abscissus  (Bowley  and  Hare)  . . . 431 

9.  Side  view  of  the  calyx.  (Coll.  W.  and  Sp.) 

Dizygocrinus  montgomeryensis  Worthen 428 

10.  Type  of  the  synonym  “ Batocrinus  Gurleyi  ” B.  and  H.  (Coll.  B.  B. 

Bowley.) 

Actinocrinus  (?)  chouteauensis  S.  A.  Miller 570 

11a.  Posterior  view  of  the  type  specimen.  (Coll.  F.  A.  Sampson.) 

11 A Ventral  aspect  of  the  same  specimen. 


Crinqipea  Camerata. 


Plate  XLVI 


A.M  Westergren  del 


Keliotype  Printing  Co.  Boston. 


PLATE  XL VII. 


Megistocrinus  Evansi  0.  and  Sli, 


Page 

533 


Fig.  la.  Lateral  view  of  a large  specimen. 
lb.  Ventral  aspect  of  the  same. 

2 a.  Basals  and  radials  of  a large  specimen  with  corrugated  surface. 

2b.  Inner  floor  of  the  anchylosed  basals. 

3.  A medium-sized  specimen  with  the  anal  opening  low  down. 

4a.  Upper  part  of  the  stem. 

4 b.  Its  lower  part. 

5a.  A rather  small  specimen  of  the  form  described  by  Hall  as  Actinocrinus 
brevicornis  ; anterior  side. 

5b.  Posterior  view  of  the  same  specimen. 

5c.  Ventral  aspect  of  same. 


Megistocrinus  nobilis  W and  Sp 537 

6.  Posterior  side  of  a large  specimen  with  arms. 

7.  Ventral  aspect  of  another  specimen  with  arms,  showing  side-  and  covering- 

plates. 

8a.  Showing  the  covering-plates  and  side-pieces  as  they  enter  the  ventral  disk 
(enlarged). 

8b.  A portion  of  the  same  specimen,  showing  the  covering-  and  side-pieces  in 
profile  (still  more  enlarged). 

(All  the  specimens  are  in  the  collection  of  Wachsmuth  and  Springer.) 


OR  1 NOIDEA  CAMERATA. 


Prate  XLVII 


A.M.Westergren.  del. 


Heliotype  Printing  Co.  Boston. 


PLATE  XL VIII. 


Megistocrinus  spinosulus  Lyon 

Fig.  la.  Posterior  view  of  the  type  specimen  ; from  Louisville.  (Lyon  collection.) 

lb.  Dorsal  aspect  of  the  same  specimen. 

lc.  Ventral  aspect  of  same. 

2.  A specimen  from  Columbus,  0. ; the  form  described  by  S.  A.  Miller  as 
M.  pileatus.  (Coll.  W.  and  Sp.) 

Megistocrinus  latus  Hall 

3a.  Ventral  aspect  of  calyx.  (Coll.  A.  S Tiffany.) 

3b.  Dorsal  view  of  same.  (The  orientation  of  both  figures  incorrect.) 

Megistocrinus  Farnsworthi  White 

4 a.  Dorsal  view  of  the  calyx.  (Coll.  W.  and  Sp.) 

4 b.  Side  view  of  another  specimen.  (Same  collection.) 

Megistocrinus  conga vus  W.  and  Sp 

5a.  Dorsal  view  of  the  calyx.  (Coll.  W.  and  Sp.) 

5b.  Lateral  view  of  the  type  specimen.  (Davenport  Acad.  Sci.) 

5c.  Ventral  aspect  of  the  same  specimen. 

Megistocrinus  rugosus  Lyon  and  Cass 

6a.  Dorsal  aspect  of  the  calyx.  (Coll.  W.  and  Sp.) 

6b.  Ventral  aspect  of  the  type  specimen.  (Lyon  collection.) 

6c.  Anterior  view  of  a smaller  specimen,  showing  portion  of  the  anal  tube. 
(Same  collection.) 


Page 

544 


538 


539 


543 


542 


Crinoidea  Camerata. 


Plate  XLVJ.I1 


Chas.R.Keyes  del. 


Heliotype  Printing  C».  Boston. 


PLATE  XLIX. 


Megistocrinus  abnormis  Lyon 

Fig.  la.  Dorsal  aspect  of  the  calyx.  (Coll.  TV.  and  Sp.) 
lb.  Lateral  view  of  the  same  specimen. 

1 c.  Ventral  aspect  of  another  specimen.  (Same  collection.) 

Megistocrinus  depressus  Hall , . . 

2.  A specimen  from  Hew  York.  (Coll.  A.  S.  Tiffany.) 

3.  Side  view  of  a specimen  from  Louisville.  (Coll.  TV.  and  Sp.) 

4 a.  Dorsal  aspect  of  a specimen  from  Hew  York.  (State  Mus.  Hat.  Hist.  H.  Y.) 
4 b.  Ventral  aspect  of  another  specimen.  (Same  collection.) 

4c.  Portion  of  the  arms.  (Same  collection.) 

4rZ.  Dorsal  aspect  of  a small  specimen  from  Hew  York,  showing  the  ornamenta- 
tion. (Coll.  TV.  and  Sp.) 

Megistocrinus  nodosus  Barris . . . 

5a.  Lateral  view  of  the  type  specimen.  (Mus.  Davenport  Acad.  Hat.  Sci.) 

5b.  Ventral  aspect  of  another  specimen.  (Same  collection.) 

Megistocrinus  multidecoratus  Barris 

6.  Lateral  aspect  of  the  type  specimen.  (Same  collection.) 


Page 

546 


540 


541 


542 


Crinoidea  Camerata. 


Plate  XU'/.. 


Chas  R.Keyes  del. 


Helictype  Priming  Go.  Boston. 


PLATE  L. 


Page 

Periechocrinus  necis  (Winch,  and  Marcy) 524 

Fig.  la.  Posterior  side  of  an  internal  cast.  (Coll.  W.  C.  Egan.) 

1 b.  Ventral  aspect  of  another  cast.  (Same  collection.) 

Periechocrinus  infelix  W.  and  M 525 

2a.  An  interior  cast  in  a side  view.  (Same  collection.) 

2b.  Ventral  aspect  of  an  internal  cast.  (Same  collection.) 

2c.  Lateral  view  of  a specimen  figured  by  S.  A.  Miller  as  Saccocrinus  Egani. 
(Same  collection.) 

2d.  Ventral  aspect  of  another  cast,  figured  as  S.  Egani.  (Same  collection.) 

Periechocrinus  ornatus  Hall  and  Whitf 527 

3a.  Gatta-perclia  cast  from  a mould  in  the  rock,  showing  surface  markings; 

posterior  side.  (After  Hall  and  Whitfield.) 

3b.  Anterior  view  of  an  internal  cast.  (After  Hall  and  Whitfield.) 

Periechocrinus  tennesseensis  (Hall) 528 

4.  Posterior  view  of  Rcemer’s  type  specimen.  (After  Rcemer.) 

Periechocrinus  urniformis  (S.  A.  Miller) 526 

5 a.  Posterior  view  of  an  internal  cast.  (Coll.  W.  C.  Egan.) 

5b.  Ventral  aspect  of  another  cast.  (Same  collection.) 

Periechocrinus  speciosus  (Hall) 521 

6a.  The  type  specimen.  (After  Hall.) 

6b.  Part  of  an  arm  enlarged.  (After  Hall.) 

Periechocrinus  marcouanus  (Winch,  and  Marcy) 523 

7 a.  Side  view  of  an  internal  cast;  anal  side  to  the  left.  (Coll.  W.  C.  Egan.) 

7 b.  Anterior  view  of  the  dorsal  cup.  (Same  collection.) 


Chinoidea  Camerata. 


Plate  L 


Ghas.R. Keyes  del. 


Heliotype  Printing  Co., Boston. 


. 


UNIVERSE  ™E  ,UIN0|S 


PLATE  LI. 

Page 

Periechocrinus  Whitfieldi  (Hall)  522 

g.  1.  A very  large  and  unique  specimen  with  arms. 

2a.  Side  view  of  the  dorsal  cup.  (After  Hall.) 

2b.  The  plates  of  one  ray,  showing  ornamentation.  (After  Hall.) 


3.  Posterior  view  of  a large  elongate  specimen. 

4.  Ventral  aspect  of  another  specimen. 

Periechocrinus  marcouanus  (Winch,  and  Marcy) 523 

Side  view  of  the  dorsal  cup. 

Periechocrinus  tenuidiscus  (Hall) 531 

6.  Antero-lateral  view  of  the  dorsal  cup. 

Periechocrinus  ornatus  (Hall) 527 

7.  Side  view  of  the  calyx ; from  St.  Paul,  Ind. 

Megistocrinus  nobilis  W.  and  Sp 537 

8.  A young  specimen.  (Type  of  Megistocrinus  parvus.) 

Periechocrinus  Whitei  (Hall) 530 


9.  Anterior  view  of  a large  specimen  with  arms  from  the  Lower  Burlington 

group. 

10.  A specimen  from  the  Ivinderhook  group  of  Marshall  Co.,  Iowa. 

(All  specimens,  except  2a  and  b,  in  the  collection  of  Wachsmuth  and  Springer.) 


Grind  idea  Gamer ata. 


Plate  LI 


Ghas  R.  Keyes,  del. 


Keliotype  Printing  Co.,Bostor.. 


UWVEBSITvTltUNOIS. 


PLATE  LII. 

Page 

Actinocrinus  lobatus  Hall 557 

Fig.  la.  Ventral  aspect  of  a large  specimen. 
lb.  Anterior  view  of  the  same. 

Actinocrinus  verrucosus  Hall 558 

2a.  A large  specimen  with  anal  tube,  and  portions  of  the  arms. 

2b.  Posterior  view  of  the  calyx. 

2c.  Ventral  aspect  of  the  calyx. 

Actinocrinus  multi radiatus  Shum 555 

3.  Large  specimen  with  arms. 

4 a.  Posterior  view  of  the  calyx. 

lb.  Ventral  aspect  of  the  same  specimen. 

5.  Lateral  view  of  another  specimen. 

6.  Another  specimen  with  arms. 

Actinocrinus  Griffithi  W.  and  Sp 568 

7.  Anterior  view  of  the  calyx. 

Actinocrinus  tuberculosus  W.  and  Sp 573 

8a.  Posterior  side  of  the  type  specimen. 

8 b.  The  structure  at  the  upper  part  of  the  arms. 

8c.  The  proximal  arm  plates  (enlarged.) 


(All  the  specimens  in  the  collection  of  Wachsmuth  and  Springer.) 


GrinoIdea  Camerata. 


Plate  LII 


A.M.Westergren.  del. 


Heliotype  Printing  Co.,  Boston. 


LlBiiAii? 

UNf»n«iulm. 


PLATE  LIII. 

Page 


Actinocrinus  multiramosus  W.  and  Sp 564 

Fig.  1.  A magnificent  specimen  with  arms  and  anal  tube. 

Acttnocrinus  magnificus  W.  and  Sp 567 

2.  A very  large  specimen  with  arms. 


(Both  in  the  collection  of  Wachsmuth  and  Springer.) 


Crinoidea  Camerata.  Plate  LIII 


"S 


A.M.Westergren.  del.  Heliotype 


LIBRARY 

OF  THE 

• UNIVERSITY  Of  ILLINOIS. 


PLATE  LIV. 


Page 

Actinocrinus  jugosus  Hall 563 

Fig.  1.  Posterior  side  of  a large  calyx.  (Coll.  L.  A.  Cox.) 

Actinockinus  Lowei  Hall 562 

2.  Lateral  view  of  the  calyx.  (Same  collection.) 

Actinockinus  lobatus  Hall 557 

3.  Anterior  view  of  a specimen  with  arms.  (Mus.  Comp.  Zool.) 

Actinocrinus  trijugis  (S.  A.  Miller) 576 

4a.  Posterior  view  of  the  calyx.  (One  of  the  type  specimens ; in  the  Coll,  of 
F.  A.  Sampson.) 

45.  Ventral  aspect  of  the  same  specimen. 

Cactocrinus  glans  (Hall) 625 

5.  Posterior  view  of  the  calyx.  (Coll.  W.  and  Sp.) 

6a.  Lateral  view  of  a less  nodose  specimen.  (Same  collection.) 

65.  Another  view  of  the  same  specimen. 

7.  Hall’s  type  of  Actinocrinus  eryx.  (Mus.  Comp.  Zool.) 

Amphoracrinus  viminalis  (Hall) 590 

8.  Specimen  with  arms.  (Coll.  W.  and  Sp.) 


Grins  idea  camerata. 


Plate  LIV 


mrfyj 


A.M.Westergren  del. 


Heliotype  Printing  Cov Boston. 


PLATE  LV. 


Page 

Actinockixus  lobatus  Hall 557 

Fig.  la.  Posterior  view  of  a fine  specimen;  showing  portions  of  anal  tube  and  arms. 

(Coll.  W.  and  Sp.) 
lb.  Stem  near  the  calyx. 

Actixocrixus  pernodosus  Hall 561 

2a.  Anterior  view  of  the  calyx.  (Same  collection.) 

2b.  Posterior  view  of  another  specimen.  (Same  collection.) 

Actixocrixus  multiramosus  W.  and  Sp 564 

3.  The  calyx  with  an  Onychaster  fastened  to  the  anal  tube.  (Same  collection.) 

Actixocrixus  texuisculptus  McChesney 571 

4 a.  Anterior  side  of  a specimen  with  arms.  (Same  collection.) 

4 b.  Posterior  side  of  the  calyx.  (Same  collection.) 

Actixocrixus  scitulus  M.  and  W 559 

5.  Anterior  side  of  a specimen  with  arms.  (Same  collection.) 

6a.  Side  view  of  the  calyx.  (Same  collection.) 

6b.  Posterior  view  of  the  same  specimen. 

Actinocrixus  arrosus  (S.  A.  Miller) 577 

7.  One  of  the  type  specimens.  (Coll.  F.  A.  Sampson.) 

8«.  Dorsal  aspect  of  the  calyx.  (Same  collection.) 

8b.  Side  view  of  the  same  specimen. 

8c.  Ventral  aspect  of  same. 

Cactocrixus  obesus  (Keyes) 613 

9a.  Side  view  of  the  type  specimen.  (Coll.  Missouri  Surv.) 

9b.  Ventral  aspect  of  the  same.  (Coll.  W.  and  Sp.) 

Cactocrixus  sexarmatus  (Hall) 615 

10.  Left  postero-lateral  side  of  the  dorsal  cup.  (Coll.  W.  and  Sp ) 

11.  Posterior  view  of  the  calyx.  (Same  collection.) 

Cactocrixus  fossatus  (S.  A.  Miller) 620 

12.  The  type  specimen,  showing  the  posterior  side  of  the  calyx.  (After  Miller.) 


C.R[ NOIDEA  CAM? KATA. 


A*  it 


<9 a 


<S‘/, 


Chas.R.Keyes  J. L.Ridgwa/  del 


Hello  type  Printing  Co^  Boston. 


ljsrarv 

UNIVERSITV  Of  ILLINOIS 


PLATE  LYI. 


Page 

Actinocrinus  daphne  (Hall) 574 

Fig.  1.  Posterior  view  of  a large  specimen.  (Coll.  W.  and  Sp.) 

Cactocrinus  thalia  (Hall) 604 

2.  Specimen  with  arms,  described  by  Hall  as  Actinocrinus  infrequens.  (Mas. 

Comp.  Zool.) 

Cactocrinus  thetis  (Hall) 614 

3.  Posterior  view  of  the  calyx  and  anal  tube.  (Coll.  W.  and  Sp.) 

4.  A large  specimen  with  arms.  (Same  collection.) 

Cactocrinus  opusculus  (Hall) 607 

5a.  Specimen  with  arms.  (Mus.  Comp.  Zool.) 

5b.  Calyx,  showing  the  left  posterior  ray  and  the  anal  interradius.  (Coll. 

W.  and  Sp.) 

Cactocrinus  multibrachiatus  (Hall) 617 

6.  Antero-lateral  view  of  the  calyx.  (Coll.  W.  and  Sp.) 

7.  Posterior  view  of  another  specimen.  (Same  collection.) 

Cactocrinus  lucina  (Hall) 603 

8.  Anterior  view  of  a specimen  with  arms.  (Mus.  Comp.  Zool.) 

9.  Posterior  side  of  the  calyx ; from  near  Louisiana,  Mo.,  described  by  Eowley 

and  Hare  as  Actinocrinus  puteatus.  (Coll.  E.  E.  Eowley.) 

Cactocrinus  ectypus  (Meek  and  Wortlienj 611 

10.  Side  view  of  a large  specimen.  (Coll.  W.  and  Sp.) 

Actinocrinus  gracilis  W.  and  Sp 572 

11.  A specimen  with  arms  Q*).  (Mus.  Comp.  Zool.) 


Crinoidea  Camerata. 


Plate  LVI 


A.M.Westergren.  del. 


Heliotype  Printing  Cov Boston. 


ufijfkw 

UNivEBsiTv™'  iUIN0|S 


PLATE  LVII. 


Pace 

Cactocrinus  nodobraciiiatus  W.  ancl  Sp 622 

Fig.  1.  Posterior  side  of  a fine  specimen  with  arms;  the  arms  incurving  and  touch- 


ing the  summit  of  the  disk. 

2.  Anterior  view  of  another  specimen. 

Cactocrinus  ornatissimus  W.  and  Sp 621 

3.  Posterior  view  of  the  type  specimen. 

Cactocrinus  Arnoldi  W.  and  Sp 624 


4a.  Specimen  with  arms  and  pinnules  (the  nodes  upon  the  arms  are  not  pre- 
served.*) 

4b.  Side  view  of  the  calyx,  showing  the  left  antero-lateral  ray. 

Cactocrinus  denticulatus  W.  and  Sp 606 

5 a.  The  type  specimen,  showing  the  right  posterior  ray. 

5b.  Portion  of  an  arm  from  near  the  upper  end  (enlarged). 


Cactocrinus  extensus  W.  and  Sp 616 

6.  Lateral  view  of  the  calyx. 

7.  Specimen  with  arms,  anal  tube,  and  column. 

Cactocrinus  longus  (Meek  and  Wortlien) 609 

8.  Anterior  view  of  an  unusually  fine  and  large  calyx. 

Cactocrinus  clarus  (Hall) 612 


9.  Lateral  view  of  a large  dorsal  cup  with  almost  smooth  plates. 


10.  Anterior  view  of  a specimen  with  ornamented  plates. 

Cactocrinus  reticulatus,  var.  ovatus  (Hall) 606 

11.  Anterior  view  of  the  calyx. 

Cactocrinus  thalia  (Hall) 604 

12.  Anterior  view  of  the  dorsal  cup. 


13.  Another  specimen,  showing  the  left  posterior  ray  and  anal  interradius. 

(All  the  specimens  in  the  collection  of  Wachsmuth  and  Springer.) 

* This  figure  is  misleading  iu  giving  the  appearance  of  spines  to  some  arm-fragments  lying  upon  the 

disk. 


Crimoidea  Gamer  ata. 


Plate  LVII 


/ 


A.M.We3tergren  del. 


KeEotype  ‘Printing  Co,Boston. 


LIBRARY 

OF  THE 

UNIVERSITY  of  ILL!NO!v 


PLATE  LVIII. 


Page 

Cactocrinus  clarus  (Hall) 612 

Fig.  1.  Showing  the  arm  structure,  and  the  arrangement  of  the  hooks  along  the 
pinnules. 

Cactocrinus  reticulatus  (Hall) 605 

2a.  Anterior  view  of  the  calyx. 

2b.  Posterior  view  of  the  calyx. 

Cactocrinus  proboscidalis  (Hall) 601 

3.  A large  specimen  with  arms. 

4.  Another  specimen  with  arms. 

5.  Posterior  view  of  the  calyx. 

6.  Lateral  view  of  a specimen,  showing  a portion  of  the  anal  tube. 

7 a.  Portion  of  an  arm,  showing  the  dorsal  side  of  the  pinnules  and  the  hooks; 
the  food  grooves  open  at  places,  and  closed  at  others, 

7b.  The  ventral  side  of  the  pinnules  still  more  enlarged,  showing  the  arrange- 
ment of  the  covering  plates  and  side  pieces,  and  also  at  intervals  the 
bottom  of  the  food  grooves. 

7c.  Dorsal  aspect  of  three  adjoining  pinnules  greatly  enlarged. 


7 d.  A single  pinnule  joint,  greatly  enlarged. 

Cactocrinus  multibrachiatus  (Hall)  . 617 

8.  Anterior  side  of  a fine  specimen  with  arms. 

Cactocrinus  limabrachiatus  (Hall) 608 


9.  Lateral  view  of  the  calyx  (one  of  the  rays  abnormal,  having  but  one  costal). 
lOa.  Specimen  with  arms. 

10&.  Arm  joints,  much  enlarged. 

(All  the  specimens  in  the  collection  of  Wachsmuth  and  Springer.) 


Crinoidea  Cambria. 


Plate  LVI1I. 


A.M.Westergren  del. 


Helioiype  Printing  Co.,  Boston. 


LIBRARY 

OF  THE 


PLATE  LIX. 


Page 

Teleiocrinus  rudis  (Hall) 630 

Fig.  1.  Specimen  with  arms  and  stem. 

2.  Anterior  view  of  a specimen  with  arms,  anal  tube,  and  stem. 

3.  Lateral  view  of  the  calyx  (a  very  large  specimen). 

Teleiocrinus  adolescens  W.  and  Sp 635 

4.  Side  view  of  the  type  specimen. 

\ 

Teleiocrinus  tenuiradiatus  (Hall) 634 

5.  Dorsal  aspect  of  a specimen  with  arms. 

6.  Anterior  side  of  a large  calyx. 

Teleiocrinus  umbrosus  (Hall) 628 

7.  Portion  of  the  stem. 

Cactocrinus  c^latus  (Hall) 618 

8.  Lateral  view  of  the  calyx ; typical  form. 

9.  Posterior  view  of  a slightly  lobed  specimen. 

Cactocrinus  c^elatus,  var.  spinotentaculus  (Hall) 619 

10.  Anterior  view  of  the  calyx. 


(All  specimens  in  the  collection  of  Wachsmuth  and  Springer.) 


Crinoidea  Camerata. 


Plate  lix. 


Ghas.R.Keyes  del. 


Heliotype  Printing  GovIBoston. 


UNIVERSITV™/  ILLINOIS, 


PLATE  LX. 

Page 

Strotocrinus  glyptus  (Hall) 640 

Fig.  la.  Specimen  with  arms  and  stem. 

lb.  Posterior  view  of  a very  large  specimen. 

1 c.  Ventral  aspect  of  a natural  cast. 

Teleiocrinus  umbrosus  (Hall) 628 

2 a.  A fine  specimen  with  arms  and  stem. 

2b.  Anterior  view  of  the  calyx  (typical  form). 

2c.  Ventral  aspect  of  another  specimen. 

2d.  A very  young  specimen  ; the  rays  free  above  the  distichals. 

Teleiocrinus  liratus  (Hall) . 633 

3.  A large  specimen  with  anal  tube  and  stem. 

Teleiocrinus  althea  (Hall) 632 

4.  Anterior  view  of  a large  calyx. 

Actixocrinus  asperrimus  M.  and  W 575 

5.  Posterior  view  of  the  calyx. 

6.  Anterior  side  of  the  calyx  (specimen  with  unusually  strong  ridges). 


(All  the  specimens  in  the  collection  of  Wachsmuth  and  Springer.) 


Grinoidea  Camerata. 


Plate  lx. 


/ a 


Ghas.R.Keyes  del. 


Heliotype  Printing  Co.,Bostor. 


library 


PLATE  LXI. 


Steganockinus  sculptus  (Hall) 

Fig.  la.  Posterior  view  of  a large  specimen  with  arms,  anal  tube,  and  stem. 

lb.  Lateral  view  of  a very  large  calyx. 

lc.  Posterior  view  of  another  calyx. 

ld.  Young  specimen  with  arms  and  column. 

le.  Portion  of  one  of  the  tubular  appendages,  showing  the  bases  of  the  arms  (f). 
1 f.  Cross-section  of  the  same  (f ). 

Steganocrinus  araneolus  M.  and  W 

2a.  Dorsal  aspect  of  a specimen  with  arms. 

2b.  Lateral  view  of  the  calyx,  and  the  lower  end  of  the  anal  tube. 

Steganocrinus  pentagonus  (Hall) 

3a.  Ventral  aspect  of  a specimen,  showing  portions  of  the  arms. 

3b.  Anterior  view  of  a large  calyx. 

3 a.  Ventral  aspect  of  the  same  specimen. 

3d.  Distal  face  of  the  first  distichal  (enlarged). 

3e.  Posterior  view  of  a smaller  specimen  with  more  regularly  arranged  covering 
pieces. 

4a.  Posterior  view  of  a specimen  from  New  Mexico. 

4b.  Ventral  aspect  of  the  same  specimen. 

Steganocrinus  concinnus  (Sliumard) 

5a.  Lateral  view  of  the  calyx. 

5b.  Ventral  aspect  of  a small  specimen. 

Steganocrinus  globosus  W.  and  Sp 

6.  Lateral  view  of  the  type  specimen. 


Page 

583 


581 


579 


582 


585 


(All  specimens  in  the  collection  of  Wachsmuth  and  Springer.) 


Crinoidea  Camerata. 


Plate  LX1 


Ghas.R.Keyes  del. 


Heliotype  Printing  Co,Boston 


• «-%-*  • — *»  • 

t ■- 

OF  THE 


PLATE  LXII. 


Page 

Amphoracrinus  spinobrachiatus  (Hall) 591 

Fig.  1.  Dorsal  aspect  of  a specimen  with  a portion  of  the  arms. 

2.  Side  view  of  a specimen  with  arms. 

3.  Lateral  view  of  the  calyx. 

4.  Dorsal  aspect  of  the  calyx,  showing  the  ornamentation. 

Amphoracrinus  divergens  (Hall) 588 

5.  Dorsal  aspect  of  a somewhat  distorted  specimen  with  arms. 

6a.  Dorsal  aspect  of  a fine  specimen  with  spreading  arms. 

6b.  A forked  oral  spine  of  this  specimen. 

7 a.  Posterior  view  of  a fine  specimen,  showing  the  arms  and  spines  surrounding 
the  anus.  (The  specimen  was  described  by  Meek  and  Worthen  as  A.  diver- 
gens,  var.  viultiraviosus.') 

lb.  Ventral  aspect  of  the  same  specimen,  showing  the  oral  and  anal  spines. 

8a.  Side  view  of  a very  small  specimen,  showing  the  oral  spines. 

8b.  Dorsal  aspect  of  the  same  specimen. 

Sc.  Ventral  aspect  of  the  same,  showing  the  oral  and  anal  spines. 

9.  Posterior  view  of  the  calyx. 

10.  Lateral  view  of  the  calyx,  showing  lower  part  of  anal  tube. 

(Figs.  5,  7a,  and  7b  were  made  from  specimens  in  the  collection  of  the  Mus. 
Comp.  Zool. ; the  others  are  in  the  collection  of  Wachsmuth  and  Springer.) 


Crinoidea  Camerata. 


Plate  LXII. 


A.M.Westergren  del. 


Heliotype  Printing  Co.,!Boston. 


PLATE  LXIII. 

PlIYSETOCRINUS  ORNATUS  (Hall) 

Fig.  1.  Antero-lateral  view  of  a specimen  with  arms.  (Coll.  W.  and  Sp.) 

2.  Posterior  view  of  the  calyx.  (Same  collection.) 

3.  Ventral  aspect,  showing  annular  impression  made  by  a Capula,  which  covered 

the  anal  opening.  (Same  collection.) 

4.  Anterior  view  of  a large,  slightly  crushed  specimen.  (Same  collection.) 

Piiysetocrinus  Copei  (Miller) 

5.  Side  view  of  large  specimen.  (Same  collection.) 

Physetoceinus  ventricosus  (Hall) 

6.  Type  of  the  variety  internodkis  Hall.  (Mus.  Comp.  Zool.) 

Physetocrinus  asper  Meek  and  Worthen 

7 a.  Posterior  view  of  the  type  specimen.  (Mus.  Comp.  Zool.) 
lb.  Ventral  aspect  of  the  same. 

Physetocrinus  lobatus  W.  and  Sp 

8 a.  Side  view  of  the  calyx.  (Coll.  W.  and  Sp.) 

8b.  Ventral  aspect  of  the  calyx.  (Same  collection.) 

Teleiocrinus  ALTHEA  (Hall) 

Lateral  view  of  the  type  specimen.  (Mus.  Comp.  Zool.) 


Page 

597 

598 
593 
596 

599 
632 


9. 


Crinoidea  Camerata. 


Plate  LXI1I. 


A.M.Westergren  deL 


Heliotype  Printing  Co.,  Boston. 


LIBRARY 

OF  THE 

UNIVERSITY  of  ILUN03' 


PLATE  LXIV. 


Fig.  3. 
2, 

3. 

4. 

5. 

6. 
7. 

8a. 

8b. 


9. 

10. 


Page 

Physetocrinus  ventricosus  (Hall) 593 

Specimen  with  arms,  stem,  and  root. 

Lateral  view  of  the  calyx. 

Anterior  view  of  the  calyx. 

Posterior  view  of  a small  elongate  specimen. 

Dorsal  aspect  of  a depressed  specimen  of  Hall’s  variety  “ Actinocrinus  ” reti- 
culatus. 

Anterior  view  of  the  calyx. 

Anterior  view  of  a specimen  of  the  type  of  McChesney’s  “ Actinocrinus” 
subventricosus. 

Specimen  from  the  Lower  Burlington  limestone. 

Ventral  aspect  of  the  same  specimen. 

Physetocrinus  dilatatus  M.  and  W 595 

The  type  specimen.  (After  Meek  and  Worthen.) 

Dorsal  aspect  of  another  specimen. 


(All  specimens,  except  Fig.  9,  in  the  collection  of  Wachsmuth  and  Springer.) 


Crinoidea  camerata 


Plate  LX1V. 


Ghas.R.Keyes  del. 


Helioiype  Tnriting  CorBostoru 


> 


UWVttSITVrf'lUlim 


) 


PLATE  LXV. 

Page 

Strotocrinus  regalis  (Hall) 638 

Fig.  1 a.  Lateral  view  of  the  calyx. 

lb.  Half  of  a ray  to  the  fifth  bifurcation,  drawn  from  a large  specimen. 

1 c.  The  extended  rim  of  a large  specimen,  having  portions  of  the  dorsal  cup 
broken  away,  exposing  the  subtegminal  galleries  at  the  inner  floor  of  the 
tegmen,  and  the  grooves  passing  out  from  the  centre  and  diverging  to  the 
arms. 

Id.  Specimen  showing  the  outer  face  of  the  tegmen. 

Strotocrinus  glyptus  (Hall) 640 

2«.  Dorsal  aspect  of  a medium  sized  specimen. 

2b.  Tegmen  of  another  specimen. 


(All  specimens  in  the  collection  of  Wachsmuth  and  Springer.) 


Crinoidea  Camerata. 


Belictype  printing  C::, Boston. 


Ghas.R-.Keyes  del. 


library 

UNIVERSITV  Of  ILLINOIS, 


PLATE  LXVI. 


Page 

Platycrinus  hemisphericus  M.  and  W 703 

Fig.  la.  Specimen  showing  arms  and  stem. 

lb.  Dorsal  aspect  of  another  specimen  with  arms  spreading,  and  a Platyceras 
infundibulum  covering  anal  opening. 

1 c.  Lateral  view  of  the  calyx ; also  a Platyceras  infundibulum  attached. 

Id.  Ventral  aspect  of  another  specimen. 

Platycrinus  subspinulosus  Hall 684 

2a.  Lateral  view  of  the  dorsal  cup ; a very  large  specimen. 

2b.  Base  of  the  same  specimen. 

Platycrinus  verrucosus  White 705 

3a.  Lateral  view  of  the  dorsal  cup. 

3b.  Dorsal  aspect  of  the  same. 

Platycrinus  excavatus  Hall 718 

4.  A specimen  with  arms.  (The  figure  does  not  show  sufficiently  the  abrupt 
depressions  on  the  radials  just  below  their  facets.) 

Platycrinus  nodo-striatus  W.  and  Sp 698 

5a.  Dorsal  aspect. 

5b.  Side  view  of  a somewhat  depressed  specimen. 

Platycrinus  Yandelli  0.  and  Sli 706 

6a.  Dorsal  aspect  of  a specimen  with  arms. 

6b.  Posterior  view  of  calyx. 

6c.  Ventral  aspect  of  the  same  specimen. 

Platycrinus  spinifer  W.  and  Sp 708 

7.  The  type  specimen  witli  arms. 

Platycrinus  ornigranulus  McChesney  701 

8.  A specimen  with  arms. 

Platycrinus  subspinosus  Hall 717 

9a.  Dorsal  aspect  of  a perfect  specimen  with  arms.  (Mus.  Comp.  Zool.) 

9b.  Ventral  aspect  of  the  calyx. 

Platycrinus  discoideus  O.  and  Sh 713 

10a.  Dorsal  aspect  of  a specimen  with  arms,  the  outer  parts  of  the  latter  slightly 
restoi-ed  in  two  rays. 

106.  Ventral  aspect  of  the  calyx. 

10c.  Posterior  side  of  the  same  specimen. 

(All  specimens,  except  Fig.  9a,  in  the  collection  of  Wachsmuth  and  Springer.) 


Crinoidea  Camerata. 


Plate  LXVI. 


Ghas.R  Keyes  del. 


Heliotype  Printing  Go.,Boston. 


library 


UNIVERSITV  JLLJNG 


PLATE  LXVII. 


Page 

Platycrinus  Saffordi  Hall C94 

. 1.  A fine  specimen  with  arms  and  column,  from  Indian  Creek,  Ind.  (Coll. 

W.  and  Sp.) 

2.  Side  view  of  the  calyx.  (Same  collection.) 

3.  Dorsal  cup  of  a specimen  from  Burlington.  (Same  collection.) 

Platycrinus  glyptus  M.  and  TV 693 

4.  Specimen  with  arms  and  column.  (Coll.  W.  and  Sp.) 

5.  Dorsal  cup  of  a large,  elongate  specimen.  (Same  collection.) 

Platycrinus  incomptus  White 664 

6.  A young  specimen  with  arms,  showing  the  numerous  bifurcations  of  the  rays, 

and  a faint  rugose  ornamentation. 

Platycrinus  spinifer,  var.  elongatus  W.  and  Sp 709 

7.  Lateral  view  of  the  calyx,  showing  portions  of  the  arms.  (Same  collection.) 

Platycrinus  cavus  Hall 715 

8a  and  b.  Dorsal  cup  of  two  specimens.  (Same  collection.) 

Platycrinus  Wortheni  Hall 702 

9.  The  type  specimen.  (Illinois  State  collection.) 

Platycrinus  geometricus  W.  and  Sp 697 

10.  The  type  specimen.  (Mus.  Comp.  Zool.) 

Platycrinus  truncatulus  Hall 675 


Ha.  Side  view  of  the  calyx,  showing  the  bases  of  the  arms  (enlarged). 
lib.  Side  view  of  another  specimen. 


Grinoidea  Oamerata 


Pirate  LX^/ll 


A.M.Westergren.  del. 


Heliotype  Printing  Co.,Boston. 


Crinoidea  Camerata. 


Plate  LXVI1I. 


Eelioiype  Printing  -..Boston 


A M Westergren.  del. 


PLATE  LXVIII. 


AGE 

Platycrinus  verrucosus  White 705 

g.  la.  The  type  specimen.  (Mus.  Comp.  Zool.) 

lb.  Oblique  view  of  the  dorsal  cup.  (Coll.  W.  and  Sp.) 

1 c.  Another  specimen  ; dorsal  aspect  of  the  calyx.  (Same  collection.) 

Id.  Lateral  aspect  of  a variety  from  New  Mexico,  showing  the  anal  opening. 
(Same  collection.) 

Platycrinus  pocilliformis  ITall 706 

2a.  Lateral  aspect  of  the  dorsal  cup  (the  ornamentation  from  another  specimen). 

(Coll.  W.  and  Sp.) 

2b.  Base  of  a specimen  with  larger  nodes.  (Coll.  W.  and  Sp.) 

Platycrinus  Yandelli  0.  and  Sh 706 

3a.  Dorsal  aspect  of  the  calyx ; a very  mature  specimen.  (Same  collection.) 

3b.  Ventral  aspect  of  the  same  specimen. 

3c.  Posterior  view  of  same. 

Platycrinus  Yandelli,  var.  perasper 708 

4 a.  Lateral  view  of  a specimen  with  arms.  (Mus.  Comp.  Zool.) 

4b.  Dorsal  aspect  of  the  same  specimen  (the  stem  removed). 


Platycrinus  sculptus  Hall 691 

5.  Specimen  from  New  Mexico,  lateral  view  of  the  calyx.  (Coll.  W.  and  Sp.) 

Platycrinus  parvinodus  Hall 696 


Ga.  Side  view  of  the  type,  the  specimen  somewhat  flattened.  (Mus.  Comp. 

Zool.) 

Gb.  Anterior  view  of  another  specimen  less  distorted.  (Coll.  W.  and  Sp.) 

Platycrinus  peculiaris  W.  and  Sp 700 

7 a.  Posterior  view  of  the  calyx;  the  nodes  partly  eroded  by  weathering.  (Coll. 

W.  and  Sp.) 

7 b.  Ventral  aspect  of  the  same  specimen. 

Platycrinus  geometricus  W.  and  Sp 697 

8.  Another  type  specimen.  (Coll.  W.  and  Sp.) 


Platycrinus  asper  M.  and  W 

Fig.  9 a.  The  type  specimen.  (Mus.  Comp.  Zool.) 

9b.  Basal  view  of  another  specimen.  (Mus.  Comp.  Zool.) 

Platycrinus  ornigranulus  McCh 

10a.  A fine  specimen  with  arms,  representing  the  typical  form.  (Mus.  Comp. 
Zool.) 

10A  Dorsal  aspect  of  a very  short  calyx  ; showing  the  ornamentation.  (Coll. 
W.  and  Sp.) 

10c.  A costal  and  two  pairs  of  distichals. 

11a.  A specimen  with  coarser  ornamentation.  (Same  collection.) 

11  b.  A specimen  with  a somewhat  different  ornamentation.  (Same  collection.) 
12a.  A young  specimen.  (Coll.  W.  and  Sp.) 

12 b.  A still  smaller  specimen  Q}).  (Same  collection.) 

Platycrinus  eminulus  Hall 

13a.  Anterior  view  of  calyx.  (Mus.  Comp.  Zool.) 

13 b.  Posterior  view  of  another  specimen.  (Same  collection.) 

13c.  Ventral  aspect  of  the  calyx.  (Coll.  W.  and  Sp.) 

Platycrinus  scobina  M.  and  W 

14a.  The  type  specimen.  (Mus.  Comp.  Zool.) 

14A  Dorsal  aspect  of  the  calyx.  (Coll.  W.  and  Sp.) 

Platycrinus  Gorbyi  S.  A.  Miller 


Page 

690 


701 


712 


695 


716 


15.  Dorsal  aspect  of  the  calyx.  (Mus.  Comp.  Zool.) 


\ 


LIBRARY 

OF  THE 

UNIVERSITY  of  ILLINOIS, 


PLATE  LXIX. 


Page 

Platycrinus  si'mmetricus  W.  and  Sp 655 

g.  la.  Specimen  with  arms  and  column. 

lb.  Ventral  aspect  of  the  calyx  ; a large  specimen. 

lc.  Ventral  aspect  of  a young  specimen  ; the  orals  almost  symmetrical. 

Platitcrinus  planus  0.  and  Sh 668 

2 a.  A large  specimen  with  arms. 

2b.  Lateral  view  of  the  dorsal  cup. 

2c.  A portion  of  the  arms  enlarged. 

2 d.  A young  specimen,  apparently  of  this  species. 

Platycrinus  burlingtonensis  0.  and  Sh 653 

3a.  A medium  sized  specimen  with  arms.  (After  Meek  and  Worthen.) 

3b.  Lateral  view  of  a large  calyx. 

3c.  Ventral  aspect  of  another  large  specimen,  showing  the  anal  tube. 

3d.  Posterior  view  of  a smaller  specimen. 

3e.  Ventral  aspect  of  another  small  specimen. 

3 f.  Dorsal  cup  of  a young  specimen.  (Inadvertently  drawn  with  left  antero- 
lateral interradius  at  the  top.) 

3 g.  A very  young  specimen  with  zigzag  arms,  composed  of  single  joints. 

3 h.  Portion  of  an  arm  showing  the  lateral  processes  (enlarged). 

3 i.  Portion  of  an  arm  in  a dorsal  aspect  (enlarged). 


Platycrinus  Agassizi  W.  and  Sp 669 

4.  A very  large  specimen  with  arms. 

Platycrinus  pileiformis  Hall 656 

5.  A specimen  with  arms  (slightly  restored). 

Platycrinus  boncensis  White 683 

6.  A specimen  having  six  arms  to  the  ray. 

Platitcrinus  sar.e  Hall 077 


7.  The  type  specimen.  (After  Hall.)  Somewhat  flattened. 

(All  specimens  in  the  collection  of  Wachsmuth  and  Springer,  except  that  of  3a, 
which  is  in  the  Museum  of  Comparative  Zoology,  and  Fig.  7,  which  is  in  the 
Illinois  State  Museum.) 


Grinoidea  Camerata. 


Plate  LXIX 


/ ((■ 


,3a 


3c 


V 


Ghas.R.Keyes  del. 


Heliotype  Printing  Go., Heston. 


PLATE  LXX. 


Page 

Platycrinus  sar,e  Hall 677 

. 1.  Specimen  with  faintly  ornamented  plates. 

Plata^crinus  nodo-striatus  W.  and  Sp 698 


3.  Specimen  with  six  to  the  ray,  the  most  frequent  number. 

4 a.  Lateral  view  of  the  calyx ; an  older  specimen. 

4 b.  Anal  side  of  the  same  specimen. 

4c.  Ventral  aspect  of  same. 

Platycrinus  brevinodus  Hall 688 

2.  Specimen  from  the  upper  part  of  the  Burlington  limestone  ; with  column, 
root,  and  four  arms  to  the  ray. 

5.  Specimen  from  same  horizon  with  six  arms  to  the  ray. 

6a  and  b.  Two  specimens  from  the  Keokuk  group  of  Indian  Creek,  Ind. 

Platycrinus  tenuibraciiiatus  Meek  and  Worth 687 

7.  A specimen  with  arms. 

8.  Another  specimen,  slightly  differing  in  ornamentation. 


Platycrinus  subspinulosus  Hall 684 

9.  A highly  ornamented  calyx. 

Platycrinus  Sampsoni  S.  A.  Miller 673 

10.  Lateral  view  of  the  calyx. 

Platycrinus  Pratteni  Worthen 671 


11.  A specimen  with  arms. 

12.  The  basal  disk. 

Platycrinus  pileiformis  Hall 656 

13a.  Lateral  view  of  the  calyx. 

135.  Posterior  side  of  the  calyx. 

Platycrinus  Davisi  W.  and  Sp 684 

14.  Lateral  view  of  the  type  specimen. 

(All  the  specimens  in  the  collection  of  Waclismuth  and  Springer.) 


Grinoidea  Camerata. 


Plate 


J.L.Ridgway  del 


Heliotype  Printing  Go.,  Bos 


CRINOIDEA  GaMERA'IA. 


Plate  LXXI 


Chas.R.Keyes  J.L.Ridgway  del 


H?liotype  Printing  Co,Boston. 


PLATE  LXXI. 


Page 

Platycrinus  incomptus  Wliite 6G4 

Fig.  1.  A very  large  specimen,  showing  the  numerous  ramifications  of  the  arms. 

(Coll.  W.  and  Sp.) 

2.  A small  specimen,  showing  the  same.  (Same  collection.) 

3.  The  type  specimen.  (Mus.  Comp.  Zool.) 

Platycrinus  .equalis  Hall 674 

4a.  A very  large  specimen  with  arms.  (Same  collection.) 

4b.  Portion  of  an  arm  (enlarged). 

5.  The  calyx,  showing  the  radial  facets  and  the  small  first  costal.  (Coll.  W. 

and  Sp.) 

Platycrinus  lodensis  Hall  and  Wliitf 666 

6.  The  type  specimen.  (After  Hall  and  Whitfield.) 

Platycrinus  graphicus  Hall  and  Whitf 672 

7.  The  type  specimen.  (After  Hall  and  Whitfield.) 

Platycrinus  contritus  Hall  and  Whitf 667 

8.  The  type  specimen.  (After  Hall  and  Whitfield.) 

Platycrinus  niotensis  Meek  and  Worthen 682 

9.  Specimen  with  arms  (from  Indiana). 

Platycrinus  Brittsi  S.  A.  Miller 659 

10.  The  type  specimen.  (Coll.  F.  A.  Sampson,  Sedalia). 

Platycrinus  corbuliformis  Rowley  and  Hare 657 

11  a.  Dorsal  cup  in  a side  view. 

115.  Dorsal  aspect  of  the  same  specimen.  (Coll.  R.  R.  Rowley.) 

Platycrinus  .equiternus  S.  A.  Miller 658 

12.  The  type  specimen.  (Coll.  F.  A.  Sampson.) 

Platycrinus  pisum  Rowley  and  Hare 660 

13a.  The  type  specimen  ; posterior  view.  (Coll.  R.  R.  Rowley.) 

135.  Dorsal  aspect  of  same. 


Page 

Platycrinus  quinquenodus  White 661 

g.  14a.  The  type  specimen  ; lateral  view  of  calyx.  (Mus.  Comp.  Zool.) 


14A  Ventral  aspect  of  same. 

14c.  Dorsal  aspect  of  same. 

Platycrinus  insolens  Eowley  and  Hare 659 

15.  The  type  specimen.  (Coll.  E.  E.  Eowley.) 

Platycrinus  peculiaris  W and  Sp 700 

16.  The  type,  a rather  large  example.  (Coll.  W.  and  Sp.) 

Platycrinus  allophylus  S.  A.  Miller 685 

17.  The  type  specimen.  (Coll.  F.  A.  Sampson.) 

Platycrinus  truncatulus  Hall 675 

18a.  Dorsal  aspect  of  the  calyx.  (Coll.  W.  and  Sp.) 

18&.  Side  view  of  the  dorsal  cup. 


LIBRARY” 


OF  THE 

UNIVERSITY  of  ILLINOIS, 


PLATE  LXXII. 


Page 

Platycrinus  regalis  Hall 710 

Fig.  1.  Specimen  with  arms,  stem,  and  root.  The  calyx  of  this  specimen  is  much 
distorted  by  pressure,  and  the  surface  ornamentation  obscure,  so  that  in 
some  of  the  characters  it  gives  an  incorrect  impression,  and  does  not 
represent  a typical  example  of  the  species.  (Coll.  W.  aud  Sp.) 

2.  The  type  specimen.  (Mus.  Comp.  Zool.) 

Eucladocrinus  tuberosus  (Hall) 728 

3.  Specimen,  showing  the  small  branching  arms  given  off  from  the  tubular 

appendages.  (Coll.  W.  and  Sp.) 

4 a.  Posterior  side  of  the  calyx.  (Same  collection.) 

4 5.  Dorsal  aspect  of  the  same  specimen. 

4c.  Ventral  aspect  of  same. 

Eucladocrinus  montanensis  Meek 723 

5.  The  type  specimen.  (National  Museum  at  Washington.) 

Platycrinus  Halli  Shumard 662 

6«.  Specimen  with  arms  and  stem.  (Coll.  W.  and  Sp.) 

65.  Portion  of  an  arm,  enlarged. 

la.  Posterior  side  of  the  calyx.  (Same  collection.) 

lb.  Ventral  aspect  of  the  same  specimen. 

Platycrinus  boonvillensis  S.  A.  Miller 681 

8n.  The  type  specimen,  showing  the  dorsal  cup.  (After  Miller.) 


85.  Dorsal  aspect  of  the  base.  (Coll.  W.  and  Sp.) 

9.  Another  specimen.  (Coll.  F.  A.  Sampson.) 

Platycrinus  ornigranulus  McCh 701 

10.  Basal  disk,  showing  the  ornamentation. 

Marsupiocrinus  pr^maturus  (Hall  and  Whitf.) 734 

11«.  Side  view  of  the  type  specimen. 

115.  Dorsal  aspect  of  the  same.  (After  Hall  and  Whitfield.) 


Crinoidea  Gamer ata. 


Ghas.R.Keyes  J.L.Ridgway  del  . 


UNIVERSITY  of  ILLINOIS. 


PLATE  LXXIII. 


Page 

Eucladocrinus  millebrachiatus  W.  and  Sp 720 

g.  1.  A large  specimen  ; the  tubular  appendages  hanging  over  the  calyx. 

Eucladocrinus  millebraciiiatus,  var.  immaturus  W.  and  Sp. . . 722 


2.  Dorsal  view  of  a small  specimen ; the  tubular  appendages  directed 


horizontally. 

3.  Ventral  aspect  of  a larger  specimen,  showing  the  bases  of  the  arms. 

Eucladocrinus  pleurovimineus  (White) 724 

4.  A large  specimen,  showing  the  dorsal  side  of  the  calyx. 

Eucladocrinus  pr^nuntius  W.  and  Sp 723 

5.  One  of  the  type  specimens,  showing  calyx  and  portions  of  the  arms. 

Platycrinus  huntsvill.e  (Troost)  W.  and  Sp.  . 678 


6.  A large  specimen  with  inflated  arms ; the  plates  of  the  calyx  not  ornamented. 
7a.  Another  mature  specimen  with  ornamented  calyx  plates,  the  arms  gradually 
tapering. 

lb.  A portion  of  one  ray  enlarged,  showing  the  spinous  processes  at  the  sides  of 
the  arm  plates,  the  waving  suture  lines  between  the  lower  brachials,  and 
the  arrangement  of  the  pinnules  (f). 

8b.  An  immature  specimen;  the  arms  uniserial  to  nearly  one  half  of  their 
length  (}!). 

9.  A more  mature  specimen  (}-*)• 

10.  A very  young  specimen,  the  arms  composed  of  comparatively  elongate  plates, 

and  uniserial  almost  to  their  tips  (f). 

11.  The  base  of  a highly  ornamented  specimen. 

12.  The  base  of  a smooth  specimen. 

(All  the  specimens  in  the  collection  of  Wachsmuth  and  Springer.) 


Crinoidea  Camerata. 


Plate  LXXIII. 


A .M .We st ergren  del. 


Heliotype  Printing  GovBoston. 


LIBRARY 

OF  THE 

UNIVERSITY  of  ILLINOIS, 


PLATE  LXXIV. 


Eucladocrinus  pleurovimineus  (White) 

Fig.  1.  A magnificent  specimen,  showing  the  calyx,  the  tubular  appendages,  arms, 
and  column. 

Eucladocrinus  millebrachiatus  W.  and  Sp 

2.  A moderately  large  specimen,  showing  the  dorsal  side  of  the  calyx,  tubular 

appendages,  and  arms. 

3.  Side  view  of  the  calyx. 

4.  Ventral  aspect  of  a fine  specimen,  showing  the  rigid  covering  pieces  of  the 

tubular  appendages,  and  the  ventral  furrows  along  the  arms. 

5.  Lateral  view  of  one  of  the  tubular  appendages,  showing  the  arm  openings, 

and  the  respiratory  pores  at  the  base  of  the  arms. 

6.  Cross  section  of  an  appendage,  showing  the  central  cavity. 

7.  The  appendage  with  the  covering  pieces  removed. 

8.  Distal  face  of  a stem  joint  from  near  the  calyx,  showing  the  transverse  ridge, 

and  the  minute  axial  canal. 

9.  Portion  of  an  arm  enlarged,  showing  the  pinnules. 


Page 

724 


720 


(All  the  specimens  in  the  collection  of  Wachsmuth  and  Springer.) 


Chino  idea  Camerata. 


Plate  L Y.ZN. 


A.M.Westergren  del. 


Heliotype  Printing  Co., Boston. 


J L Ridgway Ghns  R.  Keyes  del. 


Heliotype  Printing  Ce.  Boston 


Grinoidea  Carter ata. 


LATI 


*6 


PLATE  LXXV. 


Page 

Camptocrinus  myelodactylus  W.  and  Sp 779 

Fig.  1.  A specimen  with  stem  and  cirri.  (Coll.  W.  and  Sp.) 

2*  and  b.  Portions  of  the  coiled  stem  in  different  specimens,  showing  the  cirri. 

Dichocrinus  Blairi  S.  A.  Miller 778 

3.  The  type  specimen.  (After  Miller.) 

Dichocrinus  huntsvillae  W.  and  Sp 773 

4.  The  type  specimen.  (Coll.  W.  and  Sp.) 

Dichocrinus  cinctus  S.  A.  Miller  764 

5.  Specimen  with  arms.  (Same  collection.) 

Dichocrinus  conus  Meek  and  Worthen 770 

6.  The  type  specimen.  (Illinois  State  collection.) 

Platycrinus  canaliculatus  Hall 689 

7 a.  Specimen  with  arms.  (Coll.  W.  and  Sp.) 
lb.  Dorsal  aspect  of  the  calyx.  (Same  collection.) 

Platycrinus  sculptus  Hall 691 

8.  A large  specimen  with  arms.  (Same  collection.) 

9.  A smaller  specimen.  (Mus.  Comp.  Zool.) 

Platycrinus  americanus  0.  and  Sli 686 

10.  A mature  specimen  with  arms;  the  latter  biserial  from  above  the  last  bifur- 

cation. (Coll.  W.  and  Sp.) 

11.  A young  specimen  ; the  arms  uniserial  and  zigzag,  the  joints  elongate,  and 

the  pinnules  far  apart.  (Same  collection.) 

12.  Dorsal  aspect  of  the  calyx.  (Same  collection.) 

13a.  Side  view  of  the  calyx  of  a large  specimen.  (Same  collection.) 

13 b.  Anal  side  of  the  same  specimen. 

13c.  Ventral  aspect  of  the  same. 


14.  Natural  cast,  probably  of  Culicocrinus 

From  the  Niagara  group  of  Iowa.  (Same  collection.) 


735 


Page 

Coccocrinus  bacca  F.  Roemer 739 

'is?.  15a.  Dorsal  aspect  of  the  calyx  (drawn  with  the  anal  interradius  at  the  lower 
left  side). 

1 56.  Right  anterior  side  of  the  same  specimen. 

15c.  Posterior  side  of  same.  (Same  collection.! 

Marsupiocrinus  tennesseensis  (F.  Roerner) 731 

16a.  Dorsal  view  of  the  calyx.  (Coll.  W.  and  Sp.) 

166.  Ventral  aspect  of  the  same  specimen. 

Marsupiocrustus  striatus  W.  and  Sp 732 

17.  Dorsal  view  of  a rather  small  specimen.  (Same  collection.) 

18.  Ventral  aspect  of  another  specimen. 

Marsupiocrinus  tentaculatus  (Hall) 733 

19a.  The  type  specimen.  (After  Hall.) 

196.  Enlargement  of  one  of  its  rays.  (After  Hall.) 

Cordylocrinus  plumosus  (Hall) 737 

20.  The  type  specimen.  (After  Hall.) 


* 


A M Westergren  del 


Heliotype  Priming  Co,Boston. 


Plate  LXXYT. 


Crinoidea  Camerata. 


PLATE  LXXYI. 


Page 

Arthracantiia  ithacensis  Williams 749 

Fig.  la.  Lateral  view  of  a specimen  with  arms.  (Museum  Cornell  University.) 
lb.  Basal  disk. 

1 c.  The  movable  spines  upon  the  tegmen. 

Arthracantiia  punctobrachiata  Williams 750 

2a.  Specimen  showing  spine  bases.  (Coll.  W.  and  Sp.) 

2b.  Another  specimen  with  some  spines  attached.  (Coll.  Prof.  S.  Calvin.) 

Arthracantiia  depressa  W.  and  Sp 751 

3a.  Dorsal  aspect  of  the  type  specimen.  (Coll.  W.  and  Sp.) 

3b.  Ventral  aspect  of  the  same  specimen. 

Diciiocrinus  lineatus  Meek  and  Worthen 761 

4 a.  The  type  specimen ; posterior  view  of  the  calyx.  (Mus.  Comp.  Zool.) 

4 b.  Anterior  view  of  the  same  specimen. 

4c.  Dorsal  aspect  of  same. 

Dichocrinus  pisum  Meek  and  Worthen 763 

5.  Specimen  with  arms.  (Mus.  Comp.  Zool.) 

Dichocrinus  crassitestus  White 769 

6a.  The  type  specimen ; the  anterior  side  exposed.  (Same  collection.) 

6l>.  Another  specimen  with  part  of  the  column  attached.  (Coll.  W.  and  Sp.) 

6c.  Posterior  view  of  the  calyx  and  anal  tube.  (Same  collection.) 

Dichocrinus  ovatus  Owen  and  Shumard 760 

7.  A fine  specimen  with  arms.  (Mus.  Comp.  Zool.) 

Dichocrinus  liratus  Hall 759 

8.  Specimen  with  arms  and  part  of  column.  (Same  collection.) 

Dichocrinus  coxanus  Worthen 763 

9.  The  type  specimen.  (Coll.  L.  A.  Cox.) 

Dichocrinus  hamiltonensis  Worthen 772 

10.  The  type  specimen.  (Same  collection.) 


Page 

Diciiocrinus  angustus  White 708 

Fig.  11.  Posterior  view  of  a specimen  with  arms.  (Coll.  W.  and  Sp.) 

Dichocrinus  superstes  W.  and  Sp 766 

12.  Side  view  of  the  type  specimen.  (Same  collection.) 

Camptocrinus  cirrifer  W.  and  Sp 780 


13a.  The  type  specimen,  showing  the  carved  cirrus-bearing  stem ; from  the 
Kaskaskia  group  of  Kentucky.  (Coll.  W.  and  Sp.) 

13 b.  Another  specimen  from  the  Kaskaskia  group.  (Same  collection.) 

13c.  A specimen  from  the  St.  Louis  group  of  Huntsville,  Ala.  (Same  collection.) 


CR I NO  IDEA  CAMERATA. 


Plate  LXXVII. 


Chas.R  Keyes  J.L  Ridgway  del 


Eeliotype  Rrinting  Co,  Boston. 


PLATE  LXXVII. 


Page 

Dichocrinus  polydactylus  Cass,  and  Lyon 756 

la.  A large  specimen  with  arms. 

lb.  Posterior  view  of  calyx,  showing  the  elevated  dome  and  disk  ambulacra. 

Dichocrinus  lachrymosus  Hall 754 

2 a.  Specimen  with  arms  and  stem. 

2b.  Posterior  view  of  calyx. 

2c.  Ventral  aspect  of  same. 

Dichocrinus  liratus  Hall 759 

3 a.  Specimen  showing  the  arms  and  stem. 

Zb.  Posterior  view  of  the  dorsal  cup. 

Dichocrinus  cinctus  Miller  and  Gurley 764 

4 a.  Posterior  view  of  specimen  with  arms. 

4 b.  Ventral  aspect  of  the  calyx. 

4c.  Distal  face  of  first  distichal  (f). 

Dichocrinus  plicatus  Hall 758 

5a.  A small  specimen  with  arms  and  stem. 

5b.  Another  specimen,  giving  a side  view  of  the  dorsal  cup. 

Dichocrinus  ornatus  W.  and  Sp 762 

6.  Specimen  with  arms  and  stem,  from  near  Mt.  Pleasant,  Iowa. 

Dichocrinus  iaevis  Hall 765 

7a.  Specimen  with  arms.  (Coll.  Mr.  Fultz  of  Burlington.) 

7b.  Another  specimen.  (Same  collection.) 

7c.  Portion  of  an  arm  with  pinnules  (enlarged). 

Dichocrinus  ovatus  0.  and  Sh 760 

8a.  A specimen  with  arms. 

85.  Posterior  view  of  the  dorsal  cup. 

Dichocrinus  oblongus  W.  and  Sp 759 

9.  Posterior  view  of  the  type  specimen. 


Page 

Dichocrinus  pisum  M.  and  W 763 

Fig.  10.  Posterior  side  of  the  dorsal  cup.  (After  Meek  and  Worthen.) 

Dichocrinus  stiuatus  0.  and  Sh 757 

11a.  Posterior  side  of  the  dorsal  cup. 

115.  Side  view  of  another  specimen. 

Dichocrinus  inornatus  W.  and  Sp 770 

12a.  Posterior  view  of  a specimen  with  arms. 

125.  Another  specimen. 

Dichocrinus  delicatus  W.  and  Sp 766 

13.  The  type  specimen. 


(All  the  specimens,  except  la,  5 and  10,  are  in  the  collection  of  Wachsmuth 

and  Springer.) 


Cr  ino  idea  Gamer ata. 


Plate  LXXVIII 


ChasR.  Keyes  del. 


iieliotype  Printing  GovBoston. 


PLATE  LXXVIII. 


Page 

Talarocrinus  sexlobatus  (Shumard) 784 

Fig.  la.  Posterior  view  of  a specimen  from  Flagpont,  Va.  (y5).  (Coll.  W.  and  Sp.) 
lb.  Ventral  aspect  of  the  same  specimen 
1 c.  Dorsal  view  of  the  calyx.  (Coll.  W.  and  Sp.) 

Talarocrinus  ovattjs  Worthen 787 

2a.  Posterior  view  of  the  type  specimen  (j5).  (Illinois  St.  Coll.) 

2b.  Ventral  aspect  of  the  same  specimen  (y5). 

Talarocrinus  decornis  W.  and  Sp 788 

3a.  Posterior  view  of  the  type  specimen  (y5 ).  (Coll.  W.  and  Sp.) 

3b.  Ventral  aspect  of  the  same  (y5 ). 

3c.  Specimen  with  arms  (y5)-  (Same  collection.) 

Talarocrinus  symmetricus  (Cass,  and  Lyon) 786 

4 a.  Posterior  view  of  the  calyx  (y5).  (Coll.  W.  and  Sp.) 

4 b.  Ventral  aspect  of  the  same  specimen  Qf). 

5.  Posterior  view  of  type  (y5).  (Coll.  S.  S.  Lyon.) 

Talarocrinus  cornigerus  (Shumard) 783 

6a.  Posterior  view  of  a specimen  from  Pulaski  Co.,  Ky.  (Coll.  W.  and  Sp.) 

6b.  Ventral  aspect  of  the  same  specimen  (y5). 

7a.  Anterior  view  of  the  type  specimen,  from  Alabama  (\5).  (Mus.  Washington 
University,  St.  Louis.) 

7b.  Ventral  aspect  of  the  same  Qf). 

Talarocrinus  simplex  (Shumard) 790 

8a.  Anterior  view  of  the  dorsal  cup  (’y5).  (Coll.  W.  and  Sp.) 

8b.  Dorsal  aspect  of  a larger  specimen.  (Same  collection.) 

Talarocrinus  sp.  (?) 

9a.  Posterior  view  of  a specimen  from  Pulaski  Co.,  Ky.  (’y5).  Perhaps  an  ab- 
normal specimen  of  T.  sexlobatus.  (Coll.  W.  and  Sp.) 

95.  Oral  plates  of  the  same  (’y5). 

Hexacrinus  occidentalis  W.  and  Sp 

10.  Anterior  view  of  the  type  specimen.  (Mus.  Davenport  Atad.  Nat.  Sci.) 


745 


Dichocrinus  pentalobus  (Cass,  and  Lyon) 

Fig.  11a.  Lateral  view  of  the  type  specimen ; somewhat  crushed.  (Coll.  S.  S.  Lyon.) 
11&.  The  fixed  brachials,  enlarged  (f). 

11c.  An  imperfect  specimen,  showing  parts  of  the  pendant  arms.  (Coll.  S.  S. 
Lyon.) 

Hexacrinus  Leai  (Lyon) 

12tt.  Anterior  view  of  type;  the  lower  brachials  and  a few  joints  of  the  stem 
restored  from  another  specimen.  (Coll.  S.  S.  Lyon.) 

12 b.  Basal  cup  of  same  specimen. 


Dichocrinus  scitulus  Hall 

13a.  Side  view  of  a large  specimen  with  arms,  from  the  Lower  Burlington  lime- 
stone. (Coll.  W.  and  Sp.) 

13A  A small  specimen  from  the  Upper  Burlington  limestone.  (Same  collec- 
tion.) 

14.  Side  view  of  a specimen  with  arms  from  the  same  horizon.  (Same  collec- 
tion.) 


Dichocrinus  pendens  W.  and  Sp 

15.  Specimen  with  pendent  arms  from  the  Upper  Burlington  limestone.  (Coll. 
W.  and  Sp.). 

Dichocrinus  ficus  Cass,  and  Lyon 

16a.  Posterior  view  of  the  calyx.  (Coll.  W.  and  Sp.) 

16A  Side  view  of  another  specimen.  (Same  collection.) 


Page 

775 


746 


767 


774 


774 


Crinoidea  Camerata. 


Plate  LXX1X. 


A.M.Westergren.  del. 


Heliotype  Printing  Go.,  Boston. 


PLATE  LXXIX. 


Talarocrinus  subglobosus  W.  and  Sp 

Fig.  la.  Posterior  view  of  the  calyx.  (Coll.  W.  and  Sp.) 
lb.  Ventral  aspect  of  the  same  specimen. 

Pterotocrinus  depressus  Lyon  and  Cass 

‘2a.  Lateral  view  of  the  type  specimen.  (Coll.  S.  S.  Lyon.) 

2b.  Lateral  view  of  the  calyx,  showing  two  of  the  wings.  (Coll.  W.  and  Sp.) 

2c.  Dorsal  aspect  of  the  calyx.  (Same  collection.) 

2d.  Another  type  specimen,  showing  the  wings  in  position.  (Coll.  S.  S.  Lyon.) 
2e.  A wing,  showing  the  face  of  attachment. 

Pterotocrinus  acutus  Wetherby  

3a.  Posterior  view  of  the  calyx.  (Coll.  W.  and  Sp.) 

3b.  Anterior  view  of  the  same  specimen. 

3c.  Ventral  aspect  of  a specimen  with  two  of  the  wings  preserved,  and  the  anus 
covered  by  a Gasteropod.  (Same  collection.) 

3d.  Another  specimen,  showing  the  wings  in  a side  view.  (Same  collection.) 

3c.  Dorsal  aspect  of  a fine  specimen  with  arms  and  wings.  (Same  collection.) 

3/ and  g.  2 wings  of  a different  species.  (Same  collection.) 

Pterotocrinus  pyramidalis  Lyon  and  Cass.  

4a.  The  type  specimen;  lateral  view  of  the  calyx.  (Coll.  S.  S.  Lyon.) 

4 b.  Dorsal  aspect  of  the*  same  specimen. 

Pterotocrinus  ciiesterensis  Meek  and  Worthen 

5a.  One  of  the  type  specimens;  lateral  aspect.  (After  Meek  and  Worthen.) 

5b.  Another  type  specimen,  showing  the  posterior  side  of  the  calyx.  (After 
Meek  and  Worthen.) 

Pterotocrinus  capitalis  Lyon  

6a.  Postero-lateral  view  of  the  type  specimen.  (Coll.  S.  S.  Lyon.) 

Gb.  Ventral  aspect  of  the  same. 

Pterotocrinus  coronarius  Lyon 

7a.  Ventral  aspect  of  the  type  specimen.  (Same  collection.) 

7b.  Side  view  of  the  same  ; the  dorsal  cup  not  preserved. 


Pare 

789 


796 


799 


798 


802 


794 


795 


Page 

Pterotocrinus  crassus  Meek  and  Worthen i . 801 

Pig.  8.  Posterior  view  of  the  type  specimen.  (After  Meek  and  Worthen.) 

Pterotocrinus  acutus,  var.  bifurcatus  Wetherby 801 


9a.  Dorsal  aspect  of  the  type  specimen.  (After  Wetherby.) 

9&.  Ventral  aspect  of  the  same. 

10.  Diagram,  showing  the  arrangement  of  the  lower  brachials  in  Pterotocrinus. 


PLATE  LXXX. 


Page 

Acrocrinus  Shumardi  Yandell 806 

Fig.  1.  Lateral  view  of  the  type  specimen.  (Dr.  Yandell’s  collection.) 

2.  Fragmentary  specimen  from  Huntsville,  Ala.  (Coll.  W.  and  Sp.) 

3.  The  lower  part  of  the  dorsal  cup ; from  Pulaski  Co.,  Ky.  (Coll.  W.  and  Sp.) 

Acrocrinus  amphora  W.  and  Sp 808 

4.  A large  specimen  with  portions  of  the  arms  and  stem. 

5.  A smaller  specimen,  enlarged  (f). 

6.  The  calyx  somewhat  flattened  and  enlarged  (f). 

The  right  posterior  ray  forming  the  median  line  of  figure  ; the  anal  inter- 
radius occupying  the  left  side. 

7.  Another  specimen  showing  calyx  and  lower  part  of  the  arms  (|). 

8.  Ventral  aspect  of  a large  specimen  (f). 

9.  A specimen  showing  the  calyx,  the  pendent  arms,  the  turned  up  pinnules,  and 

the  stem. 

(All  in  the  collection  of  W.  and  Sp. ) 

Acrocrinus  Wortheni  Wachsmutli  807 

10a.  Diagram  made  from  the  type  specimen  in  the  Illinois  State  Museum. 

106.  Showing  the  outlines  of  the  specimen. 


Crinoidea  Camerata. 


Plate  LXXX. 


10  a 


£ 


0 


oof4a 

p--n  - r 

m g£($®  o „ 

®@J>  « 


Mi 


A.M.Weatergren  del. 


Heliotype  Printing  Co., Bos 


I 


PLATE  LXXXI. 

Page 

Eucalyptocrinus  crassus  Hall 342 

'ig.  1.  A very  large  specimen  with  arms.  (Coll.  W.  and  Sp.) 

2.  A smaller  specimen  with  arms.  (Same  collection.) 

3.  Calyx  with  arms  removed,  leaving  the  partitions  enclosing  the  arms.  (Same 

collection.) 

4.  A specimen  with  an  unusually  broad  base.  (Same  collection.) 

5.  Ventral  view  of  calyx  with  arms  and  partitions  removed,  showing  the  places 

for  the  attachment  of  the  arms.  (Same  collection.) 

G.  Showing  the  inner  floor  of  the  disk.  (Same  collection.) 

14.  Inner  floor  of  the  third  ring  of  plates  in  the  disk,  enlarged.  (After  Hall.) 

15.  One  of  the  plates  of  the  third  ring,  enlarged. 

Eucalyptocrinus  Elrodi  S.  A.  Miller 339 

7 a.  A perfect  specimen  with  arms,  from  Waldron,  Inch  (Mus.  Comp.  Zool.) 
lb.  Basal  aspect  of  the  same. 

8.  A specimen  from  Hartsville,  Ind.,  covered  with  elongate  nodules.  (Coll.  W. 

and  Sp.) 

9.  Another  specimen,  showing  the  calyx  and  partition  walls.  (Same  collection.) 

10.  Another,  showing  the  plates  which  form  the  partitions.  (After  Hall.) 

11.  The  plates  covering  and  surrounding  the  anus.  (Coll.  W.  and  Sp.) 

12.  The  plates  constituting  the  ventral  disk.  Those  forming  the  two  lower  rings 

showing  the  inner  floor,  those  of  the  two  upper  the  outer  surface.  (After 
Hall.) 

13.  Inner  floor  of  basals  and  radials.  (After  Hall.) 


Or INOIBjEA  Camerata. 


Plate  L '/Ml 


J.  L.Ridgway  del . 


HeH&type  printing  Ci).,Boston. 


PLATE  LXXXII. 


Page 

Eucalyptocrinus  ovalis  Hall 344 

Fig.  1.  Stem  and  root.  (Coll.  W.  and  Sp.) 

2.  Specimen  with  arms  and  part  of  stem.  (Same  collection.) 

3.  Another  specimen  showing  the  partition  walls.  (Same  collection.) 

4.  A specimen  with  arms.  (Same  collection.) 

5.  Showing  the  arm  facets.  (Same  collection.) 

6.  Showing  the  basals.  (Same  collection.) 

Eucalyptocrinus  magnus  Worthen  348 

7.  Dorsal  aspect  of  the  calyx.  (After  Worthen,  the  basals  corrected.) 

8.  Side  view  of  Miller’s  type  of  E.  Gorbyi.  (After  Miller.) 


Eucalyptocrinus  Lindahli  W.  and  Sp 347 

9.  A fine  specimen  with  arms.  (Illinois  State  Collection.) 

Eucalyptocrinus  ornatus  Hall 340 

10.  Internal  cast  of  the  dorsal  cup.  (Coll.  W.  and  Sp.) 

Eucalyptocrinus  Egani  S.  A.  Miller 352 


11.  Internal  cast  of  the  calyx.  (Coll.  W.  and  Sp.) 

12.  The  anal  tube.  (Coll.  W.  C.  Egan.) 

Eucalyptocrinus  turbinatus  S.  A.  Miller 351 

13.  Internal  cast  of  calyx.  (Coll.  W.  aud  Sp.) 

Eucalyptocrinus  proboscidalis  Miller 352 

14.  Internal  cast ; the  type  specimen.  (After  Miller.) 

Eucalyptocrinus  decorus  Phillips. 

15.  A specimen  from  Dudley,  England.  (Coll.  W.  and  Sp.) 

Figured  for  comparison  with  E.  decorus  Hall. 


Crinoidea  Camerata. 


Plate  LX7.XI1. 


J.L  Ridgway  A.MWestergren.  del. 


Heiiotvpe  Printing  Go.,Ecsion. 


LIBRARY 


PLATE  LXXXIII. 


- Page 

Eucalyptocrinus  inconspectus  Iiingueberg 346 

Fig.  1.  The  type  specimen.  (Coll.  Dr.  Iiingueberg.) 

2.  A specimen  with  arms.  (Same  collection.) 

Eucalyptocrinus  depressus  S.  A.  Miller 349 

3.  The  calyx  and  the  partition  walls  enclosing  the  arms.  (Coll.  W.  C.  Egan.) 

4a.  A natural  cast  of  another  specimen ; lateral  view.  (Same  collection.) 

4 b.  Basal  aspect  of  another  specimen.  (Same  collection.) 

Eucaly'ptocrinus  c.elatus  Hall 330 

5.  A plump  specimen  from  Rochester.  (Coll.  W.  and  Sp.) 

6.  A crushed  specimen  from  Lockport,  showing  the  ornamentation.  (Coll.  Dr. 

Iiingueberg.) 

7.  A very  young  specimen  referred  to  this  species  with  some  doubt  (f).  (Mus. 

Comp.  Zool.) 

Eucalyptocrinus  tuberculatus  S.  A.  Miller  .......  337 

8.  One  of  the  type  specimens.  (Mus.  Comp.  Zool.) 

9.  Another  type  specimen.  (Same  collection.) 

10.  Type  of  E.  muralis  Iiingueberg  (from  his  collection). 

Eucalyptocrinus  ventricosus  W.  and  Sp « . 341 

11.  Specimen  with  arms.  (Mus.  Comp.  Zool.) 

12.  Dorsal  aspect  of  the  calyx.  (Coll.  W.  and  Sp.) 

Eucalyptocrinus  obconicus  Hall 353 

13.  Natural  cast  of  the  dorsal  cup.  (Coll.  Thomas  A.  Greene.) 

Callicrinus  Beachleri  W.  and  Sp 355 

14a.  Lateral  view  of  the  calyx.  (Coll.  W.  and  Sp.) 

14ft.  Another  view  of  the  same  specimen,  showing  the  partition  walls  to  their 
full  length. 

Callicrinus  cornutus  Hall 357 

15.  Natural  cast  of  the  calyx.  (Coll.  Thomas  A.  Greene.) 

16.  Impression  from  a natural  mould.  (Same  collection.) 

17.  Probably  an  undescribed  variety  of  C.  cornutus.  (Same  collection.) 

Callicrinus  acanthinus  Iiingueberg 356 

18.  Inner  aspect  of  the  dorsal  cup;  the  type  specimen.  (Coll.  Dr.  Iiingueberg.) 


Crinoidea  Camerata 


Plate  L XXXII! 


/■/„ 


tj 


A.M.Westergren  del. 


Heliotype  Panting  Go., Boston. 


